Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thien van » thi van
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
duc ban » duc tan, duc van, dua ban
tai cua » tai cuc, tri cua, dai cua
lam duc » lam duoc, pham duc, nam duoc
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
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: tu sach y van xay hoi. ((hieu va) or (thien van)) lam duc ban thanh ((tai cua) OR (thai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y van xay hoi. ((hieu va) OR (thien van)) lam duc ban thanh ((tai cua) OR (thai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y van xay hoi. ((hieu va) or (thien van)) lam duc ban thanh ((tai cua) OR (thai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y van xay hoi. ((hieu va) or (thien van)) lam duc ban thanh ((tai cua) OR (thai cua)) tre*.