Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
sach thu » sach thue, sach thieu, sach tham
thu bang » thu ban, thu hang, chu bang
hieu van » hieu va, lieu va, hieu ve
cam thuc » am thuc, nam thuc, cam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
va triet » va thiet, va trien, ve triet
bang va » hang va, ban va, trang va
va hoi » xa hoi, va hoc, va hoa
tai va » thai va, mai va, tri 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 thu bang va hoi. ((hieu van) or (thien van)) cam thuc van hanh tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach thu bang va hoi. ((hieu van) OR (thien van)) cam thuc van hanh tai va triet*.