Perhaps you should try some spelling variations:
nam thuc » nam thuoc, nam thu, nam tu
hanh tai » thanh tai, hang tai, han tai
cao hoi » cau hoi, co hoi, cao hoc
xa hanh » xa thanh, xa khanh, va hanh
cu tren » tu tren, dua tren
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
tai cu » tai cuc, tai cua, tai co

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 nang cao hoi. liem ha ((nam thuc) or (am thuc)) xa hanh tai cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang cao hoi. liem ha ((nam thuc) OR (am thuc)) xa hanh tai cu tren.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang cao hoi. liem ha ((nam thuc) or (am thuc)) xa hanh tai cu tren*.