Perhaps you should try some spelling variations:
phuong cong » phuong dong, phung cong, phuong hoang
phong cong » phong chong, thong cong, chong cong
hoc thieu » toc thieu, hoc hien
canh tran » canh tranh, hanh trang, banh trang
ho chieu » theo chieu, doi chieu, mot chieu
tran van » luan van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) lang - canh tran van ((phuong cong) OR (phong cong)) van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) lang - canh tran van ((phuong cong) OR (phong cong)) van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) lang - canh tran van ((phuong cong) OR (phong cong)) van toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) lang - canh tran van ((phuong cong) OR (phong cong)) van toan cao*.