Perhaps you should try some spelling variations:
canh thanh » canh tranh, danh thanh, nhanh thanh
phong cong » phong chong, thong cong, chong cong
hoc thieu » toc thieu, hoc hien
anh thanh » danh thanh, nhanh thanh, thanh thanh
san phong » van phong, dan phong, sam phong
cong tuan » cong tan, cong luan, cong thanh
tuan phan » luan phan, toan phan, tuan pham
ho chieu » theo chieu, doi chieu, mot chieu

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 (hoc thieu)) tinh - ((canh thanh) OR (anh thanh)) san phong cong tuan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) tinh - ((canh thanh) OR (anh thanh)) san phong cong tuan phan tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) tinh - ((canh thanh) OR (anh thanh)) san phong cong tuan phan tu*".