Perhaps you should try some spelling variations:
cua viet » ca viet, cua vat, cua dieu
cam thuc » am thuc, nam thuc, cam thu
su sach » so sach, vu sach
dan vai » dan va, dan tai, dan vat
thuc va » thuc vat, thuc dan, thuc day
qua cam » qua cham, qua cac, qua ca
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
sach v » sach va, sach y, sach 2
va dan » ca dan, va dao, va dau

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 v ((nang xa) OR (lang xa)) hoi. hieu qua cam thuc va dan vai ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v ((nang xa) OR (lang xa)) hoi. hieu qua cam thuc va dan vai ((cua viet) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v ((nang xa) OR (lang xa)) hoi. hieu qua cam thuc va dan vai ((cua viet) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang xa) OR (lang xa)) hoi. hieu qua cam thuc va dan vai ((cua viet) or (hoa viet))*.