Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
van anh » van thanh, tuan anh, van minh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
ve cam » ve cham, ve cac, va cam

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 tang) or (ky dang)) xa hoi. hieu ve cam xuc ((van hanh) OR (van anh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (ky dang)) xa hoi. hieu ve cam xuc ((van hanh) OR (van anh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky tang) or (ky dang)) xa hoi. hieu ve cam xuc ((van hanh) OR (van anh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (ky dang)) xa hoi. hieu ve cam xuc ((van hanh) OR (van anh)) hai cua tre*.