Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu xanh » hieu manh, hieu nganh, dieu hanh
qua dung » quang dung, su dung, qua song
cua dong » chua dong, cua cong, cua dang
cong tap » cuong tap, cong tac, cong tan
tap nang » tai nang, phap nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) OR (chieu xanh)) - thanh trung ((qua dung) or (cua dong)) cong tap nang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - thanh trung ((qua dung) OR (cua dong)) cong tap nang cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (chieu xanh)) - thanh trung ((qua dung) or (cua dong)) cong tap nang cao".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (chieu xanh)) - thanh trung ((qua dung) or (cua dong)) cong tap nang cao*.