Perhaps you should try some spelling variations:
tang van » dang van, hoang van, trong van
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cua te, cuu tre, cua triet
danh de » hanh de, dan de, dang de
va danh » va dinh, va dan, va hanh
ky tang » ky nang, ky dang, kho tang
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, dam thuc
de cua » le cua, te cua, dieu cua
vu hai » su hai, vu ha
vu dai » vi dai, va dai, su dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu hai) or (vu dai)) ky tang van hoi. hieu ve ((cam tuc) OR (nam thuc)) va danh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu hai) OR (vu dai)) ky tang van hoi. hieu ve ((cam tuc) OR (nam thuc)) va danh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu hai) or (vu dai)) ky tang van hoi. hieu ve ((cam tuc) OR (nam thuc)) va danh de cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu hai) or (vu dai)) ky tang van hoi. hieu ve ((cam tuc) OR (nam thuc)) va danh de cua tre*.