Perhaps you should try some spelling variations:
ban hanh » ban hang
cham xuc » cam xuc, chat xuc, cham soc
su sach » so sach
vu sach » vu bach, vu khach
vu nang » vuc nang, va nang, vu dang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
su viet » so viet
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: ((su sach) OR (vu sach)) vu nang x ho. hieu ve cham xuc ((van ban) or (ban hanh)) ve su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) vu nang x ho. hieu ve cham xuc ((van ban) OR (ban hanh)) ve su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) vu nang x ho. hieu ve cham xuc ((van ban) or (ban hanh)) ve su viet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) vu nang x ho. hieu ve cham xuc ((van ban) or (ban hanh)) ve su viet*.