Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
gian dan » gian lang
dan dung » van dung, tin dung, ap dung
dung ung » dung cong
ung thpt » ung thu
thpt dan » thuc dan, tho dan
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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 - gian dan dung ung thpt dan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - gian dan dung ung thpt dan khan cap.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - gian dan dung ung thpt dan khan cap*.