Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
trinh suat » trinh luat, trinh sat, trinh quan
thong cong » trong cong, tong cong, thong thong
cong vang » cong lang, cong quang, cong ngang
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - hanh trinh suat thong cong vang ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - hanh trinh suat thong cong vang ((toan cao) OR (toan tap))*.