Perhaps you should try some spelling variations:
nam thuc » nam thuoc, nam thu, nam tu
danh vai » danh sai, danh va, doanh van
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu cao » cu cao, vu cao, su cao
ma hoi » mai hoi, xa hoi, ma hoa

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: ((tu cao) OR (tu cac)) ky nang ma hoi. hieu va ((nam thuc) OR (am thuc)) va danh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cao) OR (tu cac)) ky nang ma hoi. hieu va ((nam thuc) or (am thuc)) va danh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu cao) OR (tu cac)) ky nang ma hoi. hieu va ((nam thuc) or (am thuc)) va danh vai cua tre*.