Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
hang dien » quang dien, dang dieu, nhan dien
nam thuc » am thuc, nam thu, nam tu
dien cuu » dien cuc, dien cu, dien cua
te sach » toc sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
hieu he » hieu ve, hiem he, hieu le
va hang » van hang, va nang, va lang
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (co sach)) ky nang xa hoi. hieu he ((nam thuc) OR (nam thuoc)) va hang dien cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (co sach)) ky nang xa hoi. hieu he ((nam thuc) OR (nam thuoc)) va hang dien cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (co sach)) ky nang xa hoi. hieu he ((nam thuc) OR (nam thuoc)) va hang dien cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (co sach)) ky nang xa hoi. hieu he ((nam thuc) OR (nam thuoc)) va hang dien cuu tre*.