Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
tang luan » dung luan
huong cua » dung cua
hien anh » hien hanh, dien anh, tien anh
cong san » cong tac
san phan » san pham, van phan, sat phan
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 anh) OR (thien anh)) - hanh ((tang luan) or (huong cua)) nhung cong san phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (thien anh)) - hanh ((tang luan) OR (huong cua)) nhung cong san phan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien anh) OR (thien anh)) - hanh ((tang luan) or (huong cua)) nhung cong san phan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien anh) OR (thien anh)) - hanh ((tang luan) or (huong cua)) nhung cong san phan tap*.