Perhaps you should try some spelling variations:
ban thanh » ban hang
cau tren » cu tren, dau tren, ca tren
tham xuc » tham nuoc, tham thuc, pham duc
ban hanh » ban hang
van tham » van thanh, van tuan, van chat
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau treo
tu sach » thu sach, su sach, te sach
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang x hoi. hieu van tham xuc ((ban hanh) or (ban thanh)) vi ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu van tham xuc ((ban hanh) OR (ban thanh)) vi ((cuu tre) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu van tham xuc ((ban hanh) or (ban thanh)) vi ((cuu tre) OR (cau tren))*".