Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
cham xuc » cam xuc, chat xuc, cham soc
luc cham » luc tham, tuc cham, phuc cham
hieu luc » hieu luat, hieu qua
sach thu » sach thue, sach thieu, sach tham
xang xa » lang xa, mang xa, ang xa
sach ty » sach y, sach tu, xach tay
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ty) OR (sach thu)) xang xa hoi. hieu luc cham xuc ((van hanh) or (ban hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach thu)) xang xa hoi. hieu luc cham xuc ((van hanh) OR (ban hanh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) OR (sach thu)) xang xa hoi. hieu luc cham xuc ((van hanh) or (ban hanh)) vi cua tre*".