Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh tai » thanh tai, hang tai, han tai
nam thuc » nam thuoc, am thuc, nam thu
thuc va » thuc vat, thuc dan, thuc day
sang ma » tang ma, sang tao, mang may
va hanh » van hanh, va thanh, va danh
nang ma » tang ma, nang cao, mang may
cuu tre » cua tre, cau tren
va nam » van nam, ha nam, va nay
sai ky » sac ky
tu sai » tu bai, tu san, tu cai

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 ((nang ma) OR (sang ma)) hoi. lieu va nam thuc va hanh tai ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang ma) OR (sang ma)) hoi. lieu va nam thuc va hanh tai ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang ma) OR (sang ma)) hoi. lieu va nam thuc va hanh tai ((cuu tre) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang ma) OR (sang ma)) hoi. lieu va nam thuc va hanh tai ((cuu tre) or (cau treo))*.