Perhaps you should try some spelling variations:
phong cong » phong chong, thong cong, chong cong
mot chieu » doi chieu
hoc thieu » toc thieu, hoc hien
tranh hai » tranh thai, thanh hai, tran hai
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
ho chieu » theo chieu, doi chieu, thi chieu

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 (mot chieu))) or (hoc thieu)) tinh - canh tranh hai phong cong toan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((ho chieu) OR (mot chieu))) OR (hoc thieu)) tinh - canh tranh hai phong cong toan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((ho chieu) OR (mot chieu))) or (hoc thieu)) tinh - canh tranh hai phong cong toan phan tu".
• Adding a wildcard symbol may retrieve word variants: ((((ho chieu) OR (mot chieu))) or (hoc thieu)) tinh - canh tranh hai phong cong toan phan tu*.