Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
te sach » toc sach
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
mang xa » lang xa, mang may, dang xay
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((mang xa) or (nang ma)) hoi. hieu ve cac thuc va danh ((vi cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((mang xa) OR (nang ma)) hoi. hieu ve cac thuc va danh ((vi cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((mang xa) or (nang ma)) hoi. hieu ve cac thuc va danh ((vi cua) or (dai cua)) tre*.