Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
thi hang » thi hanh, thi nang, thi hong
hanh lai » hanh lam, hanh tai, thanh lap
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, te sach, tu cach
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang va, hang ca
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham

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) OR (su sach)) thi hang xa hoi. hieu ve cham thuc va hanh lai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) thi hang xa hoi. hieu ve cham thuc va hanh lai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) thi hang xa hoi. hieu ve cham thuc va hanh lai ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) thi hang xa hoi. hieu ve cham thuc va hanh lai ((cua triet) or (cua viet))*.