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
thuc day » thuc dan, thuc vat
day danh » day manh, dai danh, dao danh
danh nam » dan nam, dinh nam, dang nam
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
nam van » nam dan, nam va, pham van
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 xa hoi. hieu ve cam thuc day danh nam van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thi) OR (sach thieu)) hanh xa hoi. hieu ve cam thuc day danh nam van triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) or (sach thieu)) hanh xa hoi. hieu ve cam thuc day danh nam van triet*.