Perhaps you should try some spelling variations:
khao hoat » khao sat, cao hoat, khao ha
van thanh » ban thanh, van tuan
thanh ban » thanh san, thanh van, thanh bac
hoat van » hoa van, hat van, hoang van
ky dang » ky nang
ky danh » ky anh
hieu vu » hieu va, hieu ve, hieu su
vu khao » va khao, vu kham, vu khac
ban cua » ban quan
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san

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 dang) OR (ky danh)) xa hoi. hieu vu khao hoat van thanh ban cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky dang) OR (ky danh)) xa hoi. hieu vu khao hoat van thanh ban cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky dang) OR (ky danh)) xa hoi. hieu vu khao hoat van thanh ban cua tre*.