Perhaps you should try some spelling variations:
thien danh » thien anh, thien thanh, thien chanh
thien dang » thien bang, thien nang, thien cong
thanh tran » thanh trang, thanh toan, thanh tra
quang dung » quang trung, ung dung, cuong dung
cong thanh » dong thanh, cong trinh, cong tan
duong manh » duong van
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: hoc ((thien danh) OR (thien dang)) - thanh tran quang dung ((cong thanh) or (duong manh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (thien dang)) - thanh tran quang dung ((cong thanh) OR (duong manh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) OR (thien dang)) - thanh tran quang dung ((cong thanh) or (duong manh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) OR (thien dang)) - thanh tran quang dung ((cong thanh) or (duong manh)) toan cau*.