Perhaps you should try some spelling variations:
nam thuc » nam thuoc, nam thu, nam tu
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu he » hieu ve, hiem he, hieu le
su tien » su kien, su hien, tu tieng
va dan » ca dan, va dao, va dau
x hoi » xa hoi, o hoi, x ho
ca su » cua su, cao su, ca sau

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 ky nang x hoi. hieu he ((nam thuc) OR (am thuc)) va dan ca su tien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu he ((nam thuc) OR (am thuc)) va dan ca su tien".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu he ((nam thuc) OR (am thuc)) va dan ca su tien*.