Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hanh tai » thanh tai, hang tai, han tai
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, dua ban
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
ve cao » va cao, ve bao, ve cac
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 tang) or (ky dang)) xa hoi. hieu ve cao duc ban ((hanh tai) or (thanh 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 cao duc ban ((hanh tai) OR (thanh hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (ky dang)) xa hoi. hieu ve cao duc ban ((hanh tai) or (thanh hai)) cua tre*.