Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tham » trung tam, trung thanh, trung thang
tham nhung » thi nhung
nhung cong » dung cong, thong cong, hang cong
hien sach » dien sach, thien hach, chieu sach
kien sach » dien sach, vien bach, kien mac
cong vang » cong lang, cong quang, cong ngang
vang phan » van phan, nang phan, quang phan

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 trung tham nhung cong vang phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (kien sach)) - thanh trung tham nhung cong vang phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) or (kien sach)) - thanh trung tham nhung cong vang phan tu*.