Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
nghe nam » nghe lam, nghiep nam, nghe nano
dat hang » dat khanh, dat quang, tat thang
thuc dat » thuc vat, thuc dan, thuc day
cau treo » cau theo, cau tren, cau triet
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
hang di » hang doi, hang vi, hang dien
di cau » da cau, diem cau
he nam » ha nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (so sach)) ky nang xa hoi. hieu ((he nam) OR (nghe nam)) thuc dat hang di cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (so sach)) ky nang xa hoi. hieu ((he nam) OR (nghe nam)) thuc dat hang di cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (so sach)) ky nang xa hoi. hieu ((he nam) OR (nghe nam)) thuc dat hang di cau treo*".