Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
sach thi » sach thu, sach tai, sach tham
cam thuc » am thuc, nam thuc, cam thu
hanh dam » thanh dam, hanh lam, hanh nam
hanh xu » hanh tu, hanh sua, hanh cua
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
dam van » dao van, nam van, pham van
xu hoi » xa hoi, lu hoi, vu hoi
ve cam » ve cham, ve cac, va cam

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 thi) or (sach thieu)) hanh xu hoi. hieu ve cam thuc va hanh dam van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thi) OR (sach thieu)) hanh xu hoi. hieu ve cam thuc va hanh dam van triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) or (sach thieu)) hanh xu hoi. hieu ve cam thuc va hanh dam van triet*.