Perhaps you should try some spelling variations:
su sach » so sach, vu sach
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
truc va » thuc va, thuc vat, trung va
co truc » co thuc, cau truc, co trach
hieu vo » hieu voi, hieu va, hieu ve
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet

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 sanh)) ky dang xa hoi. hieu vo co truc va ((danh vi) or (dinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ky dang xa hoi. hieu vo co truc va ((danh vi) OR (dinh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ky dang xa hoi. hieu vo co truc va ((danh vi) or (dinh vi)) cua tre*.