Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach hoi » sach doi, sach moi, cach thoi
cam thuc » am thuc, nam thuc, cam thu
hieu van » hieu va, thien van, lieu va
sach lo » sach dao, sach doi, sach moi
sach ty » sach y, sach tu, sach thu
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
va hoi » xa hoi, va hoc, va hoa
di cua » dai cua, doi cua, de cua

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) OR (sach hoi)))) hang va hoi. hieu van cam thuc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (((sach lo) OR (sach hoi)))) hang va hoi. hieu van cam thuc va hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (((sach lo) OR (sach hoi)))) hang va hoi. hieu van cam thuc va hanh di cua triet*".