Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
te sach » toc sach
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu 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 cau 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 cau 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 cau duc ((va hanh) or (van thanh)) de cau tra*.