Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
tai sao » tai san
tai cao » thai cao, tao cao, tai cac
xa hanh » xa thanh, xa khanh, va hanh
thuc xa » thuc xay, tuc xa, thuc va
lieu ha » lieu nha, lieu va, liem ha
dai hoi » dai hoc, dai hai, dai moi
mai hoi » mai khoi, lai hoi, mai doi
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 ((mai hoi) or (dai hoi)). lieu ha nam thuc xa hanh ((tai cao) OR (tai sao)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang ((mai hoi) OR (dai hoi)). lieu ha nam thuc xa hanh ((tai cao) OR (tai sao)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((mai hoi) or (dai hoi)). lieu ha nam thuc xa hanh ((tai cao) OR (tai sao)) tren".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((mai hoi) or (dai hoi)). lieu ha nam thuc xa hanh ((tai cao) OR (tai sao)) tren*.