Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, nam thu, nam tu
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
tu cao » cu cao, tu cac, vu cao
ma hoi » mai hoi, xa hoi, ma hoa
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: tu cao ky nang ma hoi. ((hieu va) OR (hieu qua)) ((nam thuc) or (am thuc)) va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cao ky nang ma hoi. ((hieu va) OR (hieu qua)) ((nam thuc) OR (am thuc)) va hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cao ky nang ma hoi. ((hieu va) OR (hieu qua)) ((nam thuc) or (am thuc)) va hanh vi cua triet*".