Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day
vai cua » hai cua, lai cua, bai cua

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 ky nang xa hoi. hieu van cam ((truc va) or (thuc va)) hanh ((vai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu van cam ((truc va) OR (thuc va)) hanh ((vai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu van cam ((truc va) or (thuc va)) hanh ((vai cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu van cam ((truc va) or (thuc va)) hanh ((vai cua) OR (dai cua)) tre*.