Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hang tai » hang va, dung tai
hanh tai » thanh tai, han tai, hinh tai
lieu nha » lieu khoa, lieu phap, lieu tham
cuu tre » cua tre, cau tren, cau treo
thuc va » thuc vat, thuc dan, thuc day
sang xa » song xa, lang xa, sang ma
lieu ha » lieu va, liem ha, lieu 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) OR (hang tai)) cuu 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) OR (hang tai)) cuu 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) OR (hang tai)) cuu 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) OR (hang tai)) cuu tre*.