Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hanh lai » hanh lam, hanh tai, thanh lap
lang van » dang van, tang van, hoang van
tu sach » thu sach, su sach, te sach
lai cua » dai cua, hai cua, lai chau
thuc va » thuc vat, thuc dan, thuc day
thi van » thi lan, thi hanh, thi nang
van lam » van nam
lang xa » lang ha, dang xay
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: tu sach thu ((lang xa) OR (lang van)) hoi. thi van lam ((duc va) or (thuc va)) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((lang xa) OR (lang van)) hoi. thi van lam ((duc va) OR (thuc va)) hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu ((lang xa) OR (lang van)) hoi. thi van lam ((duc va) or (thuc va)) hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((lang xa) OR (lang van)) hoi. thi van lam ((duc va) or (thuc va)) hanh lai cua tre*.