Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chiet tach, chieu sang, chieu xanh
nang hang » nang sang, hang hang, cang thang
cua nhung » va nhung
hang cua » mang cua, hang ca, huong cua
tan thi » tran thi, tang thi, van thi
dan thi » dang thi, tran thi, dinh thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chinh sach)) - nang hang cua nhung cong ((tan thi) OR (dan thi)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - nang hang cua nhung cong ((tan thi) OR (dan thi)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chinh sach)) - nang hang cua nhung cong ((tan thi) OR (dan thi)) cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - nang hang cua nhung cong ((tan thi) OR (dan thi)) cao*.