Perhaps you should try some spelling variations:
tranh quang » tran quang, trinh quang, tinh quang
quang dung » quang trung, ung dung, cuong dung
tieu xanh » tieu danh, chieu xanh, dieu hanh
dung cong » dung trong
cong tac » cong ty
pham cau » phan cau, pham ca, pha cau
pham can » pham van, pham lan, pham ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - canh tranh quang dung cong tac ((pham cau) OR (pham can))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - canh tranh quang dung cong tac ((pham cau) OR (pham can))".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - canh tranh quang dung cong tac ((pham cau) OR (pham can))*.