Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
hieu va » lieu va, hieu qua
cao xuc » cao duc, cao suc, chat xuc
hanh ve » hanh vi, hanh va, hanh kem
su tien » su kien, su hien, tu tieng
ve su » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach vu nang x ho. hieu va ((cao xuc) or (cam xuc)) van hanh ve su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu nang x ho. hieu va ((cao xuc) OR (cam xuc)) van hanh ve su tien.
• Adding a wildcard symbol may retrieve word variants: tu sach vu nang x ho. hieu va ((cao xuc) or (cam xuc)) van hanh ve su tien*.