Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
sach vu » sach va, sach uu, sach xu
hieu va » lieu va, hieu qua
sach tu » sach thu, cach tu, sach ty
su tien » su kien, su hien, tu tieng
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho
ve su » va su

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: thu ((sach vu) OR (sach tu)) nang x hoi. hieu va cam xuc ((van hanh) OR (ban hanh)) ve su tien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach vu) or (sach tu)) nang x hoi. hieu va cam xuc ((van hanh) OR (ban hanh)) ve su tien~".
• Adding a wildcard symbol may retrieve word variants: thu ((sach vu) or (sach tu)) nang x hoi. hieu va cam xuc ((van hanh) OR (ban hanh)) ve su tien*.