Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
thang gian » thanh gian, thanh giang, thang gieng
doi chieu » doc hieu, doi chi, mot chieu
gian van » giang van, gian dan, gian lan
van cong » van dong, van phong, phan cong
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan van » pham van, thanh van, luan van

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 - thanh thang gian van cong tan phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh thang gian van cong tan phan van*.