Perhaps you should try some spelling variations:
nghe viet » nghiep viet, nghia viet, nghe hieu
tay lang » tai lang, tay tang, tay quang
che viet » chu viet, thue viet, che bien
cham luc » cham soc, nhan luc, cham cuu
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
te sach » toc sach
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thi hang
va cham » va chat, va tham
luc va » duc va, tuc va, loc va

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 ((tay lang) or (ty hang)) xa hoi. hieu va cham luc va tinh va ((che viet) OR (nghe viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tay lang) OR (ty hang)) xa hoi. hieu va cham luc va tinh va ((che viet) OR (nghe viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tay lang) or (ty hang)) xa hoi. hieu va cham luc va tinh va ((che viet) OR (nghe viet))".
• Adding a wildcard symbol may retrieve word variants: te sach ((tay lang) or (ty hang)) xa hoi. hieu va cham luc va tinh va ((che viet) OR (nghe viet))*.