Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cu tren » tu tren, dua tren
va hanh » van hanh, va danh, ban hanh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ve cam » ve cham, ve cac, va cam
ma hoi » xa hoi, ma hoa, me hoi
vu cao » cu cao, va cao
vi cu » vi su, vi xu, vi du

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu cao ky nang ((ma hoi) OR (mai hoi)). hieu ve cam tuc ((va hanh) OR (va thanh)) vi cu tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu cao ky nang ((ma hoi) or (mai hoi)). hieu ve cam tuc ((va hanh) OR (va thanh)) vi cu tren~".
• Adding a wildcard symbol may retrieve word variants: vu cao ky nang ((ma hoi) or (mai hoi)). hieu ve cam tuc ((va hanh) OR (va thanh)) vi cu tren*.