Perhaps you should try some spelling variations:
hieu hieu » hien hieu, hieu hien, thien hieu
va thanh » gia thanh, ban thanh, va tinh
hieu cac » hieu luc, hieu va, hieu van
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
sach tu » sach thu, cach tu, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
tong xa » thong xa, trong xa, song xa
tu tong » tu tuong, tu trong, tu dong

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu tong xa hoi. hieu hieu cac xuc ((va thanh) OR (ban hanh)) vai ((cuu tre) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu tong xa hoi. hieu hieu cac xuc ((va thanh) or (ban hanh)) vai ((cuu tre) OR (cua tre))~".
• Adding a wildcard symbol may retrieve word variants: tu sach tu tong xa hoi. hieu hieu cac xuc ((va thanh) or (ban hanh)) vai ((cuu tre) OR (cua tre))*.