Perhaps you should try some spelling variations:
dan cong » dang cong, van cong, ban cong
dan dong » van dong, dan dung, dao dong
su sach » so sach, vu sach
mang xa » lang xa, mang may, dang xay
cac tac » cac toc, cac bac, cac dac
cua tre » cua te, cuu tre, cua triet
tac va » tac da, tac xa, tuc va

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 y ((mang xa) or (nang x)) hoi. lieu va cac tac va ((dan cong) or (dan dong)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((mang xa) OR (nang x)) hoi. lieu va cac tac va ((dan cong) OR (dan dong)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y ((mang xa) or (nang x)) hoi. lieu va cac tac va ((dan cong) or (dan dong)) cua tre*.