Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hanh tai » thanh tai, hang tai, han tai
cuu tre » cua tre, cau tren, cau treo
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cuc tre » duc tre, cua tre, cuc thue
tu sai » tu bai, tu san, tu cai
tuc va » thuc va, truc va, tuc xa
sai ky » sac ky
luc va » duc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky dang xay hoi. hieu va cac ((luc va) or (tuc va)) hanh tai ((cuc tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky dang xay hoi. hieu va cac ((luc va) OR (tuc va)) hanh tai ((cuc tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky dang xay hoi. hieu va cac ((luc va) or (tuc va)) hanh tai ((cuc tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky dang xay hoi. hieu va cac ((luc va) or (tuc va)) hanh tai ((cuc tre) OR (cuu tre))*.