Perhaps you should try some spelling variations:
duong tuong » duong truong, duong trong, duong vuong
tuong tham » luong tham, tuong tac, trong thai
doi chieu » doc hieu, doi chi, mot chieu
van duong » van dong, van dung, van phong
tham than » tam than, tham tham, pham thanh
toan van » tran van, toan ban, tan van
than van » thanh van, tran van, phan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (toc thieu)) sang - tinh toan van duong tuong tham than van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sang - tinh toan van duong tuong tham than van.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sang - tinh toan van duong tuong tham than van*.