Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
thu hien » thuc hien, thi hien, thua thien
nham thu » nham thuc, nam thu, pham thu
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
su hien » su kien, su tien, nhu hien
te sach » toc sach
va dat » va dao, va dau, va dap
dat vi » dat va, hat vi, dat ve

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 xa hoi. hieu ve ((cham thuc) or (nham thu)) va dat vi ((su hien) OR (thu hien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve ((cham thuc) OR (nham thu)) va dat vi ((su hien) OR (thu hien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ve ((cham thuc) or (nham thu)) va dat vi ((su hien) OR (thu hien))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve ((cham thuc) or (nham thu)) va dat vi ((su hien) OR (thu hien))*.