Perhaps you should try some spelling variations:
van dinh » van minh, van dich, va dinh
te sach » toc sach
vu dinh » quy dinh
tu nong » tu dong, tu tong, tu tuong
tu cong » thu cong, te cong, tai cong
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su
co xuc » co xuoc, co xua
va co » vo co

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 ((tu nong) OR (tu cong)) xa hoi. hieu va co xuc ((vu dinh) or (van dinh)) vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nong) OR (tu cong)) xa hoi. hieu va co xuc ((vu dinh) OR (van dinh)) vi cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nong) OR (tu cong)) xa hoi. hieu va co xuc ((vu dinh) or (van dinh)) vi cua cu".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nong) OR (tu cong)) xa hoi. hieu va co xuc ((vu dinh) or (van dinh)) vi cua cu*.