Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach vu » sach tu, sach uu, sach xu
sach va » sach xa, sach ha, sach dao
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
soc van » hoc van, oc van, sac van
su hien » su kien, su tien, thu hien
vi su » va su, ve su, ki 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) or (sach va)) nang xa hoi. hieu va cham soc van hanh vi su hien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach vu) OR (sach va)) nang xa hoi. hieu va cham soc van hanh vi su hien.
• Adding a wildcard symbol may retrieve word variants: tu ((sach vu) or (sach va)) nang xa hoi. hieu va cham soc van hanh vi su hien*.