Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dam » thanh dat, thanh nam, thanh tam
trung va » truong va, trang va, trung ha
hieu van » hieu va, thien van, lieu va
dam cua » dai cua, day cua, nam cua
truc va » thuc va, thuc vat
te sach » toc sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
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 ty ((nang xa) or (lang xa)) hoi. hieu van lam ((truc va) OR (trung va)) thanh dam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (lang xa)) hoi. hieu van lam ((truc va) OR (trung va)) thanh dam cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (lang xa)) hoi. hieu van lam ((truc va) OR (trung va)) thanh dam cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (lang xa)) hoi. hieu van lam ((truc va) OR (trung va)) thanh dam cua triet*.