Perhaps you should try some spelling variations:
su sach » so sach
vu sach » vu bach, vu khach
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
van han » van hanh, van phan, van nhan
han tai » hang tai, nhan tai, van tai
va cam » va cham, va cac, va cao
tai va » thai va, mai va, tri va
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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)) ky nang x hoi. hieu va cam xuc van han tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang x hoi. hieu va cam xuc van han tai va thiet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang x hoi. hieu va cam xuc van han tai va thiet*.