Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
duc ban » dua ban, duc man, duc manh
duc van » duc va, duc manh, duc phan
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. hieu van cam ((duc ban) or (((duc van) or (duc tan)))) thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu van cam ((duc ban) OR (((duc van) OR (duc tan)))) thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu van cam ((duc ban) or (((duc van) or (duc tan)))) thanh dai cua tre*.