Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
van thanh » ban thanh, van tuan
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac lop » cac hop, cac loai
cac lo » cac co, cac bo, cac ho
van su » dan su

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 xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh van su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve ((cac lo) OR (cac lop)) van thanh van su triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve ((cac lo) or (cac lop)) van thanh van su triet*.