The vizier search analyses you query to search catalogues matching with your words. You can specify the term to search with the explicits fields which have a "quick" access (first author, keyword, etc.), or to select one in the full list of terms listed in "All search terms".
Here are some definitions and explanations of what you can learn from them :
Tick the « Full Search » will expand the search to all search term
Tick the « Highlight » box to see the items which matches the words of your query
To search for an exact expression, quotes are required :
e.g. "Kepler Input Catalog"
To restrict the search to specific catalogs/surveys like Gaia, SDSS, 2MASS... you can use the filed alias
e.g. alias: Gaia
Returns catalogs (including DR1 and DR2) whereas « Gaia » alone gives a long list of catalogs.
To retrieve the catalogs which use the name of the sources from a specific survey, you can use tables.columns.name :
Return a long list of catalogs where the 2MASS names of the sources are given in at least one table of the catalog.
To search for catalogs containing measurements from specific telescopes, you can look in the Description term :
e.g. description:Kepler Q17
Results catalogs having "Kepler" in the Description section AND "Q17" anywhere else…