Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cam thuc » am thuc, nam thuc, cam thu
hanh lam » thanh lap, hanh kem, hanh va
sach bai » sach dao, cac bai, sach xa
sach tai » sach tham, sach dao, sach xa
su tien » su kien, su hien, tu tieng
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach tai) or (sach bai)) lang xa hoi. hieu va cam thuc va hanh lam ((su tien) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tai) OR (sach bai)) lang xa hoi. hieu va cam thuc va hanh lam ((su tien) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: su ((sach tai) or (sach bai)) lang xa hoi. hieu va cam thuc va hanh lam ((su tien) or (cua viet))*.