Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu lang » thu hang, thu bang, phu lang
hanh hai » thanh hai, nhanh hai, hang hai
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cau tren, cau treo
van lam » van nam
thi van » thi lan, thi hanh, thi nang
lang xa » lang ha, dang xay, lang van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu lang xa hoi. thi van lam ((duc va) or (thuc va)) hanh hai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu lang xa hoi. thi van lam ((duc va) OR (thuc va)) hanh hai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu lang xa hoi. thi van lam ((duc va) or (thuc va)) hanh hai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach thu lang xa hoi. thi van lam ((duc va) or (thuc va)) hanh hai ((cua tre) OR (cuu tre))*.