Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue lang » thu hang, thu bang, phu lang
lang van » dang van, tang van, hoang van
dao thai » dao thi, do thai, da thai
te sach » toc sach
van hoi » van hoa, van hoc, van hoe
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, cua triet

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 thue lang van hoi. hieu qua cac duc va ((dao thai) or (do thi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thue lang van hoi. hieu qua cac duc va ((dao thai) OR (do thi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach thue lang van hoi. hieu qua cac duc va ((dao thai) or (do thi)) cua tre*.