Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
trang va » hang va
tran van » luan van
dan thai » dang thai, dan thi, ban thai
dan than » dan chan, ban than, van than

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 xanh - hanh ((trang va) or (tran van)) nhung cong ((dan thai) OR (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh ((trang va) OR (tran van)) nhung cong ((dan thai) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh ((trang va) or (tran van)) nhung cong ((dan thai) OR (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh ((trang va) or (tran van)) nhung cong ((dan thai) OR (dan than)) cao*.