Perhaps you should try some spelling variations:
van chat » cao chat
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, toan cau
duc van » duc va, duc tan, duc manh
vi va » vi van, vai va, bi va
vu va » vu van, tu va, su va

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 ((van cau) or (van chat)) duc van hanh ((vi va) OR (vu va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ((van cau) OR (van chat)) duc van hanh ((vi va) OR (vu va)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ((van cau) or (van chat)) duc van hanh ((vi va) OR (vu va)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ((van cau) or (van chat)) duc van hanh ((vi va) OR (vu va)) triet*.