Perhaps you should try some spelling variations:
thien van » thi van
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
quan vi » quan li, quan tri, quan doi
tuan vi » luan vi, quans vi, tuan tai
te sach » toc sach
cac tuc » cac tu, cac tac, cac nuoc
nang xa » nang x, lang xa, nang ma
cac toc » cac toi, cac nuoc, cac thoi

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. thien van ((cac tuc) or (cac toc)) van ((tuan vi) or (quan vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. thien van ((cac tuc) OR (cac toc)) van ((tuan vi) OR (quan vi)) va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. thien van ((cac tuc) or (cac toc)) van ((tuan vi) or (quan vi)) va triet*.