Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
van thanh » ban thanh, van tuan
vu khanh » vu thanh, van khanh, duy khanh
thu sac » thu sach, thu san, thu xac
hai cua » thai cua, dai cua, hoi cua
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
lo van » le van, vo van, so van
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang ((ma hoi) or (mai hoi)). hieu ((vu kham) OR (vu khanh)) lo van thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang ((ma hoi) OR (mai hoi)). hieu ((vu kham) OR (vu khanh)) lo van thanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang ((ma hoi) or (mai hoi)). hieu ((vu kham) OR (vu khanh)) lo van thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang ((ma hoi) or (mai hoi)). hieu ((vu kham) OR (vu khanh)) lo van thanh hai cua tre*.