Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
trinh qua » trinh quan, trinh cua, trinh luan
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: theo chieu sang - hanh ((((trinh qua) OR (trinh quang))) or (trinh luat)) dung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - hanh ((((trinh qua) OR (trinh quang))) OR (trinh luat)) dung cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sang - hanh ((((trinh qua) OR (trinh quang))) or (trinh luat)) dung cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - hanh ((((trinh qua) OR (trinh quang))) or (trinh luat)) dung cong tac toan tap*.