Perhaps you should try some spelling variations:
doc hieu » hoc thieu, hoc hien
phan dat » phan dau, phan dai, phan day
dat dung » dan dung, vat dung, da dung
dung ung » dung cong
van phan » van phong, van thanh, luan phan
thu van » thuc van, thuy van, tu van
phan ap » phan lap, phan tap, han ap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) sach - phan dat dung ung thu van phan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sach - phan dat dung ung thu van phan ap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sach - phan dat dung ung thu van phan ap*.