Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
thuc va » thuc vat, thuc dan, thuc day
danh te » danh tu, danh het, danh yen
sach tu » sach thu, cach tu, sach uu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
sach ty » sach y, sach thu, xach tay
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
te cua » tue cua, le cua, de cua
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ve) OR (hieu va)) cham thuc va danh te cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ve) or (hieu va)) cham thuc va danh te cua te~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ve) or (hieu va)) cham thuc va danh te cua te*.