Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam truc » lam truoc, lam thuoc, lam trung
nam truc » nam truoc, nam thuc, nam trung
te sach » toc sach
xay hoi » xa hoi, tay hoi, cay phoi
va hanh » van hanh, va thanh, va danh
y van » ly van, ty van, _ van

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 y van xay hoi. hieu van ((lam truc) OR (nam truc)) va hanh ((hoi cua) or (hoi chuc)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y van xay hoi. hieu van ((lam truc) OR (nam truc)) va hanh ((hoi cua) OR (hoi chuc)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y van xay hoi. hieu van ((lam truc) OR (nam truc)) va hanh ((hoi cua) or (hoi chuc)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach y van xay hoi. hieu van ((lam truc) OR (nam truc)) va hanh ((hoi cua) or (hoi chuc)) triet*.