Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
qua tham » qua cham, qua than, qua thanh
te sach » toc sach
hang vi » hang va, hanh vi, khang voi
cua tre » cuu tre, cua triet, dua tren
hang di » hang doi, hang dien, hang dich
sach tu » sach thu, cach tu, sach ty
thuc va » thuc vat, thuc dan, thuc day
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
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: te sach tu nang xa hoi. hieu qua tham thuc va ((hang vi) OR (hang di)) ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang xa hoi. hieu qua tham thuc va ((hang vi) or (hang di)) ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. hieu qua tham thuc va ((hang vi) or (hang di)) ((cua tre) OR (cua te))*.