Perhaps you should try some spelling variations:
dung phuong » bang phuong, dung chung, hoang phuong
dung thuong » dung trong, hang thuong, cong thuong
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
than tap » toan tap, phan tap, than cap
han tap » han tai, toan tap, nhan tai

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 tinh - hanh tranh cua ((dung phuong) OR (dung thuong)) dan ((than tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu tinh - hanh tranh cua ((dung phuong) OR (dung thuong)) dan ((than tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tinh - hanh tranh cua ((dung phuong) OR (dung thuong)) dan ((than tap) or (han tap))".
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - hanh tranh cua ((dung phuong) OR (dung thuong)) dan ((than tap) or (han tap))*.