Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
tham thuc » nham thuc, pham thuc, tam thuc
va thanh » gia thanh, ban thanh, va tinh
dua tren » dung tren
dang xay » dang van, van xay
qua tham » qua cham, qua than, qua thanh
cua tre » cua te, cua triet, cua thep
cuu tre » cau tren, cau treo
thuc va » thuc vat, thuc dan, thuc day
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
lai ky » sai ky, dai ky
te lai » te tai, te bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te lai ky dang xay hoi. hieu qua tham thuc va thanh tai ((((cua tre) OR (dua tren))) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te lai ky dang xay hoi. hieu qua tham thuc va thanh tai ((((cua tre) OR (dua tren))) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te lai ky dang xay hoi. hieu qua tham thuc va thanh tai ((((cua tre) OR (dua tren))) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te lai ky dang xay hoi. hieu qua tham thuc va thanh tai ((((cua tre) OR (dua tren))) or (cuu tre))*.