Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, cach thuc
sach tham » sach nha
lam duoc » nam duoc, luat duoc, lam thuoc
cuu tre » cau tren, cau treo
va hang » van hang, va nang, va lang
duoc va » nuoc va, duc va, duoc ma
thi van » thi lan, thi hanh, thi nang
van lam » van nam
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cua triet, dua tren

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) OR (sach tham)) lang xa hoi. thi van lam duoc va hang va ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thue) OR (sach tham)) lang xa hoi. thi van lam duoc va hang va ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thue) OR (sach tham)) lang xa hoi. thi van lam duoc va hang va ((cuu tre) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: te ((sach thue) OR (sach tham)) lang xa hoi. thi van lam duoc va hang va ((cuu tre) or (cua tre))*.