Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach thue » sach thu, sach thieu, sach tham
cam thuc » am thuc, nam thuc, cam thu
su triet » su viet, su tien, ve triet
dang xay » dang van, van xay
mang xa » lang xa, mang may, mang cua
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
vi su » va su, ve su, ki su

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 thue ((((dang xay) or (mang xa))) or (nang x)) hoi. hieu va cam thuc va hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach thue ((((dang xay) OR (mang xa))) OR (nang x)) hoi. hieu va cam thuc va hanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach thue ((((dang xay) or (mang xa))) or (nang x)) hoi. hieu va cam thuc va hanh vi su triet*.