Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
hanh di » hanh de, hang di, danh di
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach tu, sach thu
hang xa » hoang xa, hang va, hang ca
sach lo » sach dao, sach doi, sach hoi
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: tu ((sach ty) or (sach lo)) hang xa hoi. hieu van cam thuc va ((hanh di) OR (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach lo)) hang xa hoi. hieu van cam thuc va ((hanh di) OR (hanh vi)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach lo)) hang xa hoi. hieu van cam thuc va ((hanh di) OR (hanh vi)) cua triet*".