Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
cau tra » ca tra, cau ra, cau truc
y nang » ky nang, ly nang, v nang
de cau » ke cau, le cau, ve cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang xa hoi. ((hieu van) OR (hieu va)) cam duc ((va hanh) or (van thanh)) de cau tra~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. ((hieu van) OR (hieu va)) cam duc ((va hanh) OR (van thanh)) de cau tra.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. ((hieu van) OR (hieu va)) cam duc ((va hanh) or (van thanh)) de cau tra".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((hieu van) OR (hieu va)) cam duc ((va hanh) or (van thanh)) de cau tra*.