Perhaps you should try some spelling variations:
thanh tung » thanh cong
quang tong » quang thong, quang dong, quang tung
hien sach » dien sach, thien hach, chieu sach
kien sach » dien sach, vien bach, kien mac
cua quang » cua quan, qua quang, chat quang
tong luan » tang luan, dung luan, hang luan
luan phan » luan van, luan hoan
tung cua » trung cua, tuong cua, dung cua
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sach) or (kien sach)) - thanh tung cua quang tong luan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (kien sach)) - thanh tung cua quang tong luan phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) or (kien sach)) - thanh tung cua quang tong luan phan dau*.