Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
dieu hoa » dien hoa, tieu hoa, hieu hoa
hanh dai » hanh tai, hanh dao, vanh dai
thuoc va » thuc va, thuoc ma, thuong va
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
hieu ha » hieu hoa, hieu va, hieu ca
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuat toan)) ky lang xa hoi. ((hieu ha) or (dieu hoa)) nam thuoc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat toan)) ky lang xa hoi. ((hieu ha) OR (dieu hoa)) nam thuoc va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat toan)) ky lang xa hoi. ((hieu ha) or (dieu hoa)) nam thuoc va hanh dai cua tre*.