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

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