Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac trung » cac truong, dac trung, bac trung
trung va » truong va, trang va, trung ha
vu khach » vu khanh, vu khac, vay khach
van nang » van quang, van ban, van dong
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, va danh
qua cac » cua cac
nang xa » nang x, lang xa, nang ma
su tien » su kien, su hien, tu tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (vu khach)) van nang xa hoi. hieu qua cac trung va hanh vi ((cua triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu khach)) van nang xa hoi. hieu qua cac trung va hanh vi ((cua triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu khach)) van nang xa hoi. hieu qua cac trung va hanh vi ((cua triet) or (su tien))*.