Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
hieu viec » nhieu viec, hieu ve, sieu viet
hieu van » hieu va, thien van, lieu va
va danh » va dan, va hanh, dia danh
doi cua » dai cua, hoi cua
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang x hoi. ((hieu viec) or (hieu van)) bach tuoc ((va danh) or (va dinh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang x hoi. ((hieu viec) OR (hieu van)) bach tuoc ((va danh) OR (va dinh)) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang x hoi. ((hieu viec) or (hieu van)) bach tuoc ((va danh) or (va dinh)) doi cua tre*.