Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
dung huong » dung thuong, dung phuong, dong huong
doi chieu » doc hieu, doi chi, mot chieu
tranh cua » doanh cua, manh cua
ho chieu » theo chieu, hoc thieu, mot chieu
cua dung » cua dang, cua dong, qua dung
toan tai » toan tap, doanh tai, toan ban
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: ((ho chieu) or (doi chieu)) tinh - hanh tranh cua dung huong dan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) tinh - hanh tranh cua dung huong dan ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) tinh - hanh tranh cua dung huong dan ((toan tai) or (toan cao))*.