Perhaps you should try some spelling variations:
nhanh tri » nhanh thi, thanh tri, nhanh thai
day nhanh » day thanh, duy nhanh, dac nhan
thuoc day » thuc day, thuoc dac, thuoc dang
nam thuoc » nam thuc, nam thu, nha thuoc
cua tre » cua te, cuu tre, cua triet
lieu ha » lieu nha, liem ha, lieu ma
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi
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 tang ((ma hoi) or (xa hoi)). ((lieu ha) OR (lieu va)) nam thuoc day nhanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang ((ma hoi) OR (xa hoi)). ((lieu ha) OR (lieu va)) nam thuoc day nhanh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang ((ma hoi) or (xa hoi)). ((lieu ha) OR (lieu va)) nam thuoc day nhanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang ((ma hoi) or (xa hoi)). ((lieu ha) OR (lieu va)) nam thuoc day nhanh tri cua tre*.