Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
te sach » toc sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
van cac » van hac, van cau, van bac
xuc van » duc van, luc van, vuc van
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

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