Perhaps you should try some spelling variations:
chinh quang » tinh quang, nhanh quang, minh quang
dinh quang » tinh quang, minh quang, dinh duong
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (hoc thieu)) sang - hanh ((chinh quang) or (dinh quang)) dung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) sang - hanh ((chinh quang) OR (dinh quang)) dung cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc thieu)) sang - hanh ((chinh quang) or (dinh quang)) dung cong tac toan tap*.