Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
khao hoat » khao sat, cao hoat, khao ha
thanh ban » thanh san, thanh van, thanh bac
hoat ban » hoat van, thuat ban, hoang ban
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
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 cac, tu san, tu bac

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