Perhaps you should try some spelling variations:
sach tran » sach tranh, sach tren, vach tran
lam truoc » lam thuoc, nam truoc, lam truong
cua triet » cua viet, su triet, va triet
nam truc » nam truoc, nam thuc, nam trung
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
quang x » quang _, quang d, quang y
hieu ve » hieu va, hieu van
hanh te » hanh tu, hanh ve, hanh de
te cua » tue cua, le cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach tran quang x hoi. hieu ve ((lam truoc) or (nam truc)) van hanh te cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tran quang x hoi. hieu ve ((lam truoc) OR (nam truc)) van hanh te cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach tran quang x hoi. hieu ve ((lam truoc) or (nam truc)) van hanh te cua triet*.