Perhaps you should try some spelling variations:
sach tham » sach nha
sach thu » sach thue, sach thieu, cach thuc
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
chua tre » chua tri, cua tre, chua trieu
lang xa » lang ha, dang xay, lang van
van lam » van nam
duoc va » nuoc va, duc va, duoc ma
va nang » van nang, da nang, cam nang
nang ca » nang cao, nang cap, nang cai
ca chua » ca cua, sua chua

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) OR (sach tham)) lang xa hoi. hieu van lam duoc va nang ca chua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) OR (sach tham)) lang xa hoi. hieu van lam duoc va nang ca chua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) OR (sach tham)) lang xa hoi. hieu van lam duoc va nang ca chua tre*.