Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
kho tang » cao tang
cam tuc » cam xuc, cam tu, nam thuc
ky tang » ky nang, ky dang, ky trong
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
so sac » so sach, so dac
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa
vi hoa » voi hoa, vi hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ((ky tang) or (kho tang)) ma hoi. hieu ve cam tuc ((va danh) or (van hanh)) vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ((ky tang) OR (kho tang)) ma hoi. hieu ve cam tuc ((va danh) OR (van hanh)) vi hoa viet.
• Adding a wildcard symbol may retrieve word variants: so sac ((ky tang) or (kho tang)) ma hoi. hieu ve cam tuc ((va danh) or (van hanh)) vi hoa viet*.