Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
danh hoi » danh hoa, dan hoi, danh hoc
tuoc va » thuoc va, nuoc va, tuc va
hoi cua » hoi chuc
duoc va » nuoc va, duc va, duoc ma
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
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 sach ky nang x hoi. ((nhieu viec) or (hieu ve)) bach ((tuoc va) OR (duoc va)) danh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. ((nhieu viec) OR (hieu ve)) bach ((tuoc va) OR (duoc va)) danh hoi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. ((nhieu viec) or (hieu ve)) bach ((tuoc va) OR (duoc va)) danh hoi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. ((nhieu viec) or (hieu ve)) bach ((tuoc va) OR (duoc va)) danh hoi cua tre*.