Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
van cau » van dau, van hau, van chat
truc va » thuc va, thuc vat, trung va
va dan » ca dan, va dao, va dau
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu van cau truc va dan ((di cua) or (de cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang x hoi. hieu van cau truc va dan ((di cua) OR (de cua)) viet.
• Adding a wildcard symbol may retrieve word variants: te sach ly nang x hoi. hieu van cau truc va dan ((di cua) or (de cua)) viet*.