Perhaps you should try some spelling variations:
thang thong » thong thong, hang thong, thang trong
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
quan cong » qua cong, luan cong, quan dong
dong tinh » dong kinh, dong tin, cong tinh
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (hieu manh)) - thang thong quan cong dong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - thang thong quan cong dong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu manh)) - thang thong quan cong dong tinh toan cau*.