Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
thanh hang » thanh hoang, thanh thang, tranh hang
mot chieu » doi chieu, ho chieu
hanh hang » hang hang, hanh han, hanh mang
cua thong » cua thuong, cua khong, cua tong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan nhan » tran nhan, tao nhan, van nhan
nhan tai » hang tai, van tai, toan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (doc hieu)) sach - ((hanh hang) or (thanh hang)) cua thong cong tan nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (doc hieu)) sach - ((hanh hang) OR (thanh hang)) cua thong cong tan nhan tai*.