Perhaps you should try some spelling variations:
hanh dieu » han dieu, hinh dieu, hoang dieu
cham sac » cham soc, pham sach, cap sac
van hanh » van thanh, ban hanh, van anh
dieu cua » dieu tra
su sach » so sach, vu sach
ty lang » tay lang, ty hang, tu lang
hieu su » hieu sau, tieu su, hieu so
su cham » su pham, tu cham, vu cham
sac van » cac van, san van, sat van
cua tre » cua te, cuu tre, cua triet

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 ((ty lang) or (ty xang)) xa hoi. hieu su cham sac van hanh dieu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty lang) OR (ty xang)) xa hoi. hieu su cham sac van hanh dieu cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty lang) or (ty xang)) xa hoi. hieu su cham sac van hanh dieu cua tre*.