Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
lang van » dang van, tang van, hoang van
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
luc van » luoc van, luu van, duc van
cau luc » cau truc, cau phuc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay
va cau » van cau, va cac, va dau
te bai » te bao, te ban, te lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te bai) or (te tai)) ky ((lang xa) OR (lang van)) hoi. hieu va cau luc van hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te bai) OR (te tai)) ky ((lang xa) OR (lang van)) hoi. hieu va cau luc van hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te bai) or (te tai)) ky ((lang xa) OR (lang van)) hoi. hieu va cau luc van hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te bai) or (te tai)) ky ((lang xa) OR (lang van)) hoi. hieu va cau luc van hanh tai cua tre*.