Perhaps you should try some spelling variations:
trinh vang » trinh van, trinh bang, trinh mang
cua triet » cua viet, su triet, va triet
quy trinh » qua trinh, quy dinh
vang cua » mang cua, hang cua, tang cua
nghe nam » nghe lam, nghiep nam, nghe nano
tu sach » thu sach, su sach, tu cach
tu nano » truc nano
te sach » toc sach
nano o » nano 1, nano cuo, nano mot
va nam » van nam, ha nam, va nay
tu quy » tu duy, tu quynh
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) tu nano o hoi. hieu ((va nam) or (nghe nam)) tu quy trinh vang cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) tu nano o hoi. hieu ((va nam) OR (nghe nam)) tu quy trinh vang cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) tu nano o hoi. hieu ((va nam) or (nghe nam)) tu quy trinh vang cua triet*.