Perhaps you should try some spelling variations:
thien danh » thien dang, thien thanh, thien chanh
thien anh » tien anh, thien thanh, thien chanh
dung cong » dung trong
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
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 anh) OR (thien danh)) - ((anh tang) or (anh dang)) cua dung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (thien danh)) - ((anh tang) OR (anh dang)) cua dung cong san toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) OR (thien danh)) - ((anh tang) or (anh dang)) cua dung cong san toan cao*".