Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van thi » van tai, dan thi, van thu
thi toc » thi tac, thi goc, thi loc
va danh » va dinh, va dan, va hanh
toc va » hoc va, toc ta, tuc va
vi cau » va cau, ve cau, viet cau
di cau » da cau, diem cau
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu van thi toc va danh ((vi cau) OR (di cau)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu van thi toc va danh ((vi cau) OR (di cau)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu van thi toc va danh ((vi cau) OR (di cau)) triet*.