Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cam thuc » am thuc, nam thuc, cam thu
tinh lai » tinh lao, tinh hai, minh lai
cua tre » cua te, cuu tre, cua triet
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly ((nang xa) OR (nang x)) hoi. hieu ve cam thuc va tinh lai ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly ((nang xa) OR (nang x)) hoi. hieu ve cam thuc va tinh lai ((cua tre) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly ((nang xa) OR (nang x)) hoi. hieu ve cam thuc va tinh lai ((cua tre) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ly ((nang xa) OR (nang x)) hoi. hieu ve cam thuc va tinh lai ((cua tre) or (cua viet))*.