Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh lap » thanh san, phan lap, thanh hai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
tu truc » tu thuoc, tu trung
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
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 ky nang x hoi. hieu van ((tu truc) or (cau truc)) van thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. hieu van ((tu truc) OR (cau truc)) van thanh lap cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu van ((tu truc) or (cau truc)) van thanh lap cua tre*.