Perhaps you should try some spelling variations:
phuong luong » thuong luong, phuong dung, chuong duong
phuong duong » phuong dung, chuong duong, phuong dong
dinh quang » tinh quang, minh quang, dinh duong
hoc thieu » toc thieu, hoc hien
hanh dinh » thanh dinh, hinh dinh, hanh tinh
ho chieu » theo chieu, mot chieu, doi chieu
dan phan » doan phan, dan chan, van phan

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)) tinh - hanh dinh quang ((phuong luong) OR (phuong duong)) dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) tinh - hanh dinh quang ((phuong luong) OR (phuong duong)) dan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) tinh - hanh dinh quang ((phuong luong) OR (phuong duong)) dan phan tu".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) tinh - hanh dinh quang ((phuong luong) OR (phuong duong)) dan phan tu*.