Perhaps you should try some spelling variations:
van nhan » van phan, van thanh, danh nhan
su sach » vu sach
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc van » hoc van, oc van, sac van
tai va » thai va, mai va, dai 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 (so sach)) ky nang x hoi. hieu ve cham soc van nhan ((tai va) or (tri va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang x hoi. hieu ve cham soc van nhan ((tai va) OR (tri va)) thiet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang x hoi. hieu ve cham soc van nhan ((tai va) or (tri va)) thiet*.