Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
manh dung » manh hung, manh tung, anh dung
cua nhung » va nhung
cong tinh » cong trinh, cong vinh, long tinh
hoa sinh » cho sinh
dung cua » dung luan, dung cho
toan ban » van ban

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 (hoa sinh)) - manh dung cua nhung cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hoa sinh)) - manh dung cua nhung cong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hoa sinh)) - manh dung cua nhung cong tinh toan ban*.