Perhaps you should try some spelling variations:
thien van » thi van
van tuan » van quan, van ban, anh tuan
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac toc » cac toi, cac thoi
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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 nuoc) or (cac toc)) van tuan ((vi cua) OR (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. thien van ((cac nuoc) OR (cac toc)) van tuan ((vi cua) OR (di cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. thien van ((cac nuoc) or (cac toc)) van tuan ((vi cua) OR (di cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. thien van ((cac nuoc) or (cac toc)) van tuan ((vi cua) OR (di cua)) triet*.