Perhaps you should try some spelling variations:
dung phuong » dung thuong, dung chung, hoang phuong
hanh tranh » canh tranh, hanh trinh, hanh trang
chuan chat » chuan chau, chuan ha, luan chat
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
dan chuan » doan chuan, dan chan, dong chuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (doi chieu)) xanh - hanh tranh cua ((dung phuong) OR (bang phuong)) dan chuan chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (doi chieu)) xanh - hanh tranh cua ((dung phuong) OR (bang phuong)) dan chuan chat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (doi chieu)) xanh - hanh tranh cua ((dung phuong) OR (bang phuong)) dan chuan chat".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (doi chieu)) xanh - hanh tranh cua ((dung phuong) OR (bang phuong)) dan chuan chat*.