Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
danh vai » danh sai, danh va, dang van
ty trong » ly trong, ky trong, y trong
trong xa » trong xay, trong ca, trong xu
qua cham » qua hai, qua cac, va cham
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
tuc va » thuc va, truc va, tuc xa
xuc va » duc va, luc va, xac va

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 ty trong xa hoi. hieu qua cham ((xuc va) OR (tuc va)) ((danh vai) or (doanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty trong xa hoi. hieu qua cham ((xuc va) OR (tuc va)) ((danh vai) OR (doanh van)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty trong xa hoi. hieu qua cham ((xuc va) OR (tuc va)) ((danh vai) or (doanh van)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty trong xa hoi. hieu qua cham ((xuc va) OR (tuc va)) ((danh vai) or (doanh van)) cua tre*.