Perhaps you should try some spelling variations:
gian cac » gian dan, gian cua
nang xa » nang x, lang xa, nang ma
va hang » van hang, va nang, va lang
hang vi » hang va, hanh vi, hang di
cua tuc » cua duc, cua tu, cua thuoc
san ky » sang ky, van ky, ban ky
dan ky » van ky
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((san ky) OR (dan ky)) nang xa hoi. hieu ((gian cac) or (vien bach)) duc va hang vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((san ky) OR (dan ky)) nang xa hoi. hieu ((gian cac) OR (vien bach)) duc va hang vi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((san ky) OR (dan ky)) nang xa hoi. hieu ((gian cac) or (vien bach)) duc va hang vi cua tuc".
• Adding a wildcard symbol may retrieve word variants: thu ((san ky) OR (dan ky)) nang xa hoi. hieu ((gian cac) or (vien bach)) duc va hang vi cua tuc*.