Perhaps you should try some spelling variations:
duoc tren » nuoc tren, thuoc tren, dung tren
thanh tai » thanh hai, thanh toan, doanh tai
day thanh » dao thanh, dat thanh, da thanh
tai duoc » tao duoc, tan duoc, mai duoc
thuc day » thuc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
va nam » van nam, ha nam, va nay
sac ky » cac ky
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sai ky)) nang ((o hoi) or (co hoi)). lieu va nam thuc day thanh tai duoc tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang ((o hoi) OR (co hoi)). lieu va nam thuc day thanh tai duoc tren.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) nang ((o hoi) or (co hoi)). lieu va nam thuc day thanh tai duoc tren*.