Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
sang xa » song xa, sang ma, mang xa
hai cua » thai cua, dai cua, hoi cua
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va
xuc van » duc van, luc van, vuc van
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 ((sang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu van)) cam xuc van 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) OR (hieu van)) cam xuc van 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) OR (hieu van)) cam xuc van hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((sang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu van)) cam xuc van hanh hai cua tre*.