Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
truc xa » tuc xa, truoc xay, truc may
truc va » thuc va, thuc vat, trung va
vai cua » dai cua, hai cua, lai cua
cua tuc » cua duc, cua tu, cua thuoc

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