Perhaps you should try some spelling variations:
cham duc » cham soc, pham duy, phan duc
ky trong » ly trong, ke trong, cay trong
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky trong) or (ky dang)) xa hoi. hieu ve ((cham duc) or (pham duc)) ban hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky trong) OR (ky dang)) xa hoi. hieu ve ((cham duc) OR (pham duc)) ban hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ((ky trong) or (ky dang)) xa hoi. hieu ve ((cham duc) or (pham duc)) ban hanh hai cua tre*.