Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
cang thang » dang thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang hang » nang hang, hung thang, lang thang
dang cong » dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cua dang » cua cong, cua ban
toan cau » toan cao, toan ban, toan tai
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: hoc hieu manh - ((hang hang) or (cang thang)) cua dang cong thanh ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hang hang) OR (cang thang)) cua dang cong thanh ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hang hang) or (cang thang)) cua dang cong thanh ((toan cau) or (toan tap))*.