Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
hanh tich » hanh thich, thanh tich, hanh tinh
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu quang - hanh tich va ((nhung cong) or (dung trong)) dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - hanh tich va ((nhung cong) OR (dung trong)) dan phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - hanh tich va ((nhung cong) or (dung trong)) dan phan cau*.