Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
luoc van » luoc can, luoc va, luot van
cuc tre » duc tre, cua tre, cuu tre
luc van » luu van, duc van, luc va
hieu va » lieu va, hieu qua
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
va cau » van cau, va cac, va dau
ha hoi » hoa hoi, ha noi, xa hoi
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 ha hoi. hieu va cau ((luc van) OR (luoc van)) hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te bai) OR (te tai)) ky lang ha hoi. hieu va cau ((luc van) OR (luoc van)) hanh tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te bai) or (te tai)) ky lang ha hoi. hieu va cau ((luc van) OR (luoc van)) hanh tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: ((te bai) or (te tai)) ky lang ha hoi. hieu va cau ((luc van) OR (luoc van)) hanh tai cuc tre*.