Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
luat tuc » luat thue
ta trong » ca trong, ta trang, va trong
trong xa » trong xay, trong ca, trong xu
danh vai » danh sai, danh va, dang van
su sach » so sach, vu sach
sach ta » sach tai, sach xa, sach ha
hieu va » lieu va, hieu qua
hieu ve » hieu van
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ta trong xa hoi. ((hieu ve) OR (hieu va)) luat tuc va ((danh vai) or (doanh van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ta trong xa hoi. ((hieu ve) OR (hieu va)) luat tuc va ((danh vai) OR (doanh van)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ta trong xa hoi. ((hieu ve) OR (hieu va)) luat tuc va ((danh vai) or (doanh van)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ta trong xa hoi. ((hieu ve) OR (hieu va)) luat tuc va ((danh vai) or (doanh van)) cuu tre*.