Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thi hanh » thi thanh
va thanh » gia thanh, ban thanh, va tinh
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
thuc va » thuc vat, thuc dan, thuc day
hanh va » hanh vi
tang ma » mang may, tang van
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((tang ma) or (hang va)) hoi. thi hanh va thuc va thanh hai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((tang ma) OR (hang va)) hoi. thi hanh va thuc va thanh hai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((tang ma) or (hang va)) hoi. thi hanh va thuc va thanh hai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((tang ma) or (hang va)) hoi. thi hanh va thuc va thanh hai ((cua tre) OR (cuu tre))*.