Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chong cong » cong cong, thong cong, cuong cong
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua chong » cua cong, cua chung, cua khong
ho chieu » theo chieu, doi chieu, mot chieu
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan ban » van ban

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)) xanh - hanh trinh cua chong cong bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - hanh trinh cua chong cong bai toan ban*.