Perhaps you should try some spelling variations:
phuong luong » thuong luong, phuong duong, phuong dung
chinh quang » tinh quang, nhanh quang, minh quang
dinh quang » tinh quang, minh quang, dinh duong
hoc thieu » toc thieu, hoc hien
luong dan » huong dan, luong dao, luong van
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 ((chinh quang) OR (dinh quang)) phuong luong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) tinh - hanh ((chinh quang) OR (dinh quang)) phuong luong dan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) tinh - hanh ((chinh quang) OR (dinh quang)) phuong luong dan phan tu".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) tinh - hanh ((chinh quang) OR (dinh quang)) phuong luong dan phan tu*.