Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
cham thuc » nham thuc, pham thuc, tham thuc
su hien » su kien, thu hien, nhu hien
sach ty » sach y, sach tu, sach thu
te sach » toc sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
su tien » su kien, tu tieng, dau tien
va dau » va dao
dau vi » dau ve, dau va, dat vi

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