Perhaps you should try some spelling variations:
cao thuoc » cay thuoc, cua thuoc, nam thuoc
cao thuc » bao thuc, can thuc, cao thu
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cua tre » cuu tre, cua triet, dua tren
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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 v nang xa hoi. lieu va ((cao thuc) OR (cao thuoc)) ban hanh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang xa hoi. lieu va ((cao thuc) OR (cao thuoc)) ban hanh vai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. lieu va ((cao thuc) OR (cao thuoc)) ban hanh vai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. lieu va ((cao thuc) OR (cao thuoc)) ban hanh vai ((cua tre) or (cua te))*.