Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
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) OR (lieu va)) cam xuc va hanh ((vi va) or (vu va)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. ((hieu van) OR (lieu va)) cam xuc va hanh ((vi va) OR (vu va)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. ((hieu van) OR (lieu va)) cam xuc va hanh ((vi va) or (vu va)) viet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. ((hieu van) OR (lieu va)) cam xuc va hanh ((vi va) or (vu va)) viet*.