Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thang long » thanh cong
manh tung » manh hung, thanh tung
nam thang » nam thanh, nam trong, nam trung
tung nam » trung nam, sung nam, dung nam
long van » luong van, song van, lang van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu sach) or (thien hach)) - manh tung nam thang long van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (thien hach)) - manh tung nam thang long van toan cao.
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) or (thien hach)) - manh tung nam thang long van toan cao*.