Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
van thang » van thanh, van khang, van hang
hieu vien » hieu hien, hieu viec, thieu nien
su triet » su viet, su tien, ve triet
thang de » thanh de, trang de, thuong de
vien cac » vien bach, vien dai, vien da
cac thu » cach thuc, cac thoi
thu van » thuc van, thuy van, tu van
mai hoi » mai khoi, dai hoi, lai hoi
su sach » so sach, vu sach
sach 2 » sach y
2 nang » v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach 2 nang ((mai hoi) or (xa hoi)). hieu vien cac thu van thang de ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach 2 nang ((mai hoi) OR (xa hoi)). hieu vien cac thu van thang de ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach 2 nang ((mai hoi) or (xa hoi)). hieu vien cac thu van thang de ((cua triet) or (su triet))*.