Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
nam thuc » am thuc, nam thu, nam tu
hang tai » hang va, dung tai
lieu nha » lieu khoa, lieu phap, lieu tham
cu tren » tu tren, dua tren
xa hang » va hang, xa bang, xa hung
cao hoc » co hoc, cho hoc, chat hoc
cao hoi » cau hoi, co hoi, tao hoi
sac ky » cac ky, sai ky
tai cu » tai cuc, tai cua, tai co
tu sac » tu sach, tu cac, tu san

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) or (cao hoc)). lieu nha ((nam thuc) OR (nam thuoc)) xa hang tai cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((cao hoi) OR (cao hoc)). lieu nha ((nam thuc) OR (nam thuoc)) xa hang tai cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((cao hoi) or (cao hoc)). lieu nha ((nam thuc) OR (nam thuoc)) xa hang tai cu tren".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((cao hoi) or (cao hoc)). lieu nha ((nam thuc) OR (nam thuoc)) xa hang tai cu tren*.