Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach tham » sach nha
tham lang » nham nang, pham hang, thai bang
thien van » thi van
cam thuc » am thuc, nam thuc, cam thu
vat hanh » vat thanh, van hanh, va hanh
hanh sai » hanh san, hanh tai, danh sai
va triet » va thiet, va trien, ve triet
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
sai va » mai va, dai va, hai va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach tham lang xa hoi. ((hieu ve) or (thien van)) cam thuc vat hanh sai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach tham lang xa hoi. ((hieu ve) OR (thien van)) cam thuc vat hanh sai va triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach tham lang xa hoi. ((hieu ve) or (thien van)) cam thuc vat hanh sai va triet*.