Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nha thuoc, cay thuoc
khanh tai » thanh tai, hanh tai, nhanh thai
dau tren » dau tien, dat tren, dau tieng
xa khanh » xa thanh, van khanh, dat khanh
lieu nha » lieu khoa, lieu phap, lieu tham
tai dau » tac dau, tai du, thi dau
cao hoi » cau hoi, co hoi, cao hoc
tu ban » thu ban, te ban
tu dan » tuc dan, cu dan, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu dan) OR (tu ban)) ky nang cao hoi. lieu nha ((nam thuoc) or (nam thu)) xa khanh tai dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu dan) OR (tu ban)) ky nang cao hoi. lieu nha ((nam thuoc) OR (nam thu)) xa khanh tai dau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu dan) OR (tu ban)) ky nang cao hoi. lieu nha ((nam thuoc) or (nam thu)) xa khanh tai dau tren*".