Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cau tren » cu tren, dau tren, ca tren
van hanh » ban hanh, van anh, van ban
hieu van » hieu va, thien van, lieu va
van lam » van nam
lam luc » lao luc, lam duoc
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
y nang » ky nang, ly nang, v nang
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: te sach y nang x hoi. hieu van lam luc ((van hanh) or (van thanh)) kem ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu van lam luc ((van hanh) OR (van thanh)) kem ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu van lam luc ((van hanh) or (van thanh)) kem ((cua tre) or (cau tren))*.