Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
sang xa » song xa, sang ma, mang xa
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
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 ((sang xa) or (lang xa)) hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((sang xa) OR (lang xa)) hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((sang xa) or (lang xa)) hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((sang xa) or (lang xa)) hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) hai cua tre*.