Perhaps you should try some spelling variations:
dong doi » duong doi, dung doi, dong hoi
su sach » vu sach
doi cuu » doi cua, doi cuoc
xa dong » ha dong, van dong, lao dong
hieu ve » hieu va, hieu van
cam tuc » cam xuc, nam thuc, dam thuc
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo
cam tu » cam thu, nam tu, dam tu

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) or (so sach)) ky nang xa hoi. hieu ve ((cam tuc) or (cam tu)) xa dong doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang xa hoi. hieu ve ((cam tuc) OR (cam tu)) xa dong doi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang xa hoi. hieu ve ((cam tuc) or (cam tu)) xa dong doi cuu tre*.