Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham tuc » nham thuc, pham thuc, tham thuc
van doan » van doanh, van toan, van hoan
tu sach » thu sach, su sach, te sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
tuc van » thuc van, truc van, tuc va
cua tre » cua te, cuu tre, dua tren
y sang » _ sang, duy sang
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y sang ((ma hoi) or (xa hoi)). hieu vu cham tuc van doan va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y sang ((ma hoi) OR (xa hoi)). hieu vu cham tuc van doan va ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y sang ((ma hoi) or (xa hoi)). hieu vu cham tuc van doan va ((cua tre) or (cua triet))*.