Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh tai » thanh tai, hang tai, han tai
lieu nha » lieu khoa, lieu phap, lieu tham
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
lieu ha » lieu va, liem ha, lieu ma
sang xa » song xa, lang xa, sang ma
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
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 sang xa hoi. ((lieu ha) or (lieu nha)) nam thuc va hanh tai ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang xa hoi. ((lieu ha) OR (lieu nha)) nam thuc va hanh tai ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang xa hoi. ((lieu ha) or (lieu nha)) nam thuc va hanh tai ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang xa hoi. ((lieu ha) or (lieu nha)) nam thuc va hanh tai ((cuu tre) OR (cua tre))*.