Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
trong thanh » truong thanh, rong thanh, thong thanh
trung thanh » truong thanh
hanh trinh » canh tranh, hanh chinh
chieu xanh » chieu sach, chieu sang, chieu tinh
quang dung » quang trung, ung dung, cuong dung
hieu xanh » hieu manh, hieu nganh, dieu hanh
toan cao » toan ban, toan tap

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)) - hanh trinh quang dung ((trong thanh) or (trung thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - hanh trinh quang dung ((trong thanh) OR (trung thanh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (chieu xanh)) - hanh trinh quang dung ((trong thanh) or (trung thanh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (chieu xanh)) - hanh trinh quang dung ((trong thanh) or (trung thanh)) toan cao*.