Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh via » hanh va, anh va, hanh ve
cam thuc » am thuc, nam thuc, cam thu
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, xach tay
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) or (sach thu)) lang xa hoi. hieu van cam thuc va ((hanh via) or (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach thu)) lang xa hoi. hieu van cam thuc va ((hanh via) OR (hanh vi)) cua triet.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach thu)) lang xa hoi. hieu van cam thuc va ((hanh via) or (hanh vi)) cua triet*.