Perhaps you should try some spelling variations:
hang hai » hoang hai, hang tai, thanh hai
hanh hai » thanh hai, nhanh hai, hanh 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
nang xa » nang x, lang xa, nang ma
ve cao » va cao, ve bao, ve cac
su xac » pu xac, su cac
su sac » su sach, su 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 sac) or (su xac)) ky nang xa hoi. hieu ve cao duc ban ((hanh hai) or (hang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky nang xa hoi. hieu ve cao duc ban ((hanh hai) OR (hang hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su xac)) ky nang xa hoi. hieu ve cao duc ban ((hanh hai) or (hang hai)) cua tre*.