Perhaps you should try some spelling variations:
trong thiet » trang thiet, thuong thiet, trong hiep
doi chieu » doc hieu, doi chi, mot chieu
thiet van » thien van, thi van, hieu van
nhan dan » phan dau, gian dan, nhan tai
van phan » van phong, van thanh, luan phan
phan cap » phan lap, phan tap, phan cac
gian » giao, gia

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)) sach - nhan dan gian trong thiet van phan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (toc thieu)) sach - nhan dan gian trong thiet van phan cap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (toc thieu)) sach - nhan dan gian trong thiet van phan cap*.