Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cao thuoc » cay thuoc, cua thuoc, nam thuoc
va thanh » gia thanh, va tinh, le thanh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cao thu » cao thi, cac thu, ca thu
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. lieu va ((cao thu) or (cao thuoc)) ((va thanh) OR (ban thanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. lieu va ((cao thu) OR (cao thuoc)) ((va thanh) OR (ban thanh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. lieu va ((cao thu) or (cao thuoc)) ((va thanh) OR (ban thanh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. lieu va ((cao thu) or (cao thuoc)) ((va thanh) OR (ban thanh)) hai cua tre*.