Perhaps you should try some spelling variations:
dang phuong » bang phuong, dung phuong, dan phuong
phuong doan » phuong loan, phuong hoang, huong dan
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
doan phan » doanh phan, toan phan, dan phan
phan dau » phan tu, hang dau
sinh va » sinh vat, tinh va, dinh van
va dang » van dang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) or (chieu sach)) - nhan sinh va dang phuong doan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - nhan sinh va dang phuong doan phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (chieu sach)) - nhan sinh va dang phuong doan phan dau*.