Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
trong van » trong cac
khi sach » khi sac, khoa sach, khau sach
cap han » cap phan, cap hay, cap hoang
cap can » tap can, cap bang, cap phan
cap van » cac van, cao van, tap van
van bao » van ban, van dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khi sach - manh trung ((cap han) or (((cap can) OR (cap van)))) trong van bao cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khi sach - manh trung ((cap han) OR (((cap can) OR (cap van)))) trong van bao cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi khi sach - manh trung ((cap han) or (((cap can) OR (cap van)))) trong van bao cao".
• Adding a wildcard symbol may retrieve word variants: doi khi sach - manh trung ((cap han) or (((cap can) OR (cap van)))) trong van bao cao*.