Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
nam luc » nang luc, nhan luc, nam duoc
va hang » van hang, va nang, va lang
di cua » dai cua, doi cua, de cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
di cu » di cau, di du, da cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky tang xa hoi. hieu va ((nam luc) or (nam thuc)) va hang ((di cu) or (di cua)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang xa hoi. hieu va ((nam luc) OR (nam thuc)) va hang ((di cu) OR (di cua)) tren.
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang xa hoi. hieu va ((nam luc) or (nam thuc)) va hang ((di cu) or (di cua)) tren*.