Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien sach » dien sach, kien sach, thien hach
trinh vat » trinh van, trinh luat, sinh vat
cong luan » tong luan, cong tuan, dong luan
luan phan » luan van, luan hoan
trinh va » trinh van, trinh ve, trinh vi
phan tap » phan lap, han tap, pha tap

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 - hanh ((trinh va) or (trinh vat)) nhung cong luan phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - hanh ((trinh va) OR (trinh vat)) nhung cong luan phan tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - hanh ((trinh va) or (trinh vat)) nhung cong luan phan tap*.