Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
luat thong » luat thuong, suat thong, xuat thong
thong cong » trong cong, tong cong, thong thong
thi hanh » thi thanh
tan toan » tan tran, tap toan, van toan
bai toan » bai tap
doi thi » doi thoi, do thi, doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi thi hanh - hanh trinh luat thong cong ((tan toan) or (bai toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi thi hanh - hanh trinh luat thong cong ((tan toan) OR (bai toan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi thi hanh - hanh trinh luat thong cong ((tan toan) or (bai toan)) cau*.