Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
doan vi » doan va, don vi, doan thi
cua tre » cua te, cuu tre, cua triet
cac xuc » cac nuoc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
dan vi » don vi, dan va, gan vi

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 xa hoi. hieu ve ((cac xuc) or (cam xuc)) cam ((dan vi) or (doan vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ve ((cac xuc) OR (cam xuc)) cam ((dan vi) OR (doan vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ve ((cac xuc) or (cam xuc)) cam ((dan vi) or (doan vi)) cua tre*.