Perhaps you should try some spelling variations:
tieng trung » truong trung
dang tieng » bang tieng, nang tieng, dang tien
trung thuc » trong thuc, trang thuc, thuong thuc
doi chieu » doc hieu, doi chi, mot chieu
phan dang » phan dau, phan cong, nhan dan
thuc dan » thuc hanh, hoc dan, thuc vat
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 - phan dang tieng trung thuc dan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - phan dang tieng trung thuc dan khan cap*.