Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
quan hai » quan ha, qua hai, quan tai
quan hoi » quang hoi, quan doi, quan ho
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
su cao » cu cao, vu cao, su co
su cac » tu cac, su can, eu cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su cac) or (su cao)) ky dang xa hoi. hieu ve cham duc va ((quan hoi) OR (quan hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (su cao)) ky dang xa hoi. hieu ve cham duc va ((quan hoi) OR (quan hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su cac) or (su cao)) ky dang xa hoi. hieu ve cham duc va ((quan hoi) OR (quan hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su cac) or (su cao)) ky dang xa hoi. hieu ve cham duc va ((quan hoi) OR (quan hai)) cua tre*.