Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
hanh doi » thanh doi, hanh noi, hang doi
te sach » toc sach
cua tre » cuu tre, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ve tham » va tham, ve cham, vi tham
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
cua te » cua tu

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 ly ((nang xa) or (nang x)) hoi. hieu ve tham thuc va hanh doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly ((nang xa) OR (nang x)) hoi. hieu ve tham thuc va hanh doi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach ly ((nang xa) or (nang x)) hoi. hieu ve tham thuc va hanh doi ((cua tre) or (cua te))*.