Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
dan phuong » doan phuong, van phuong, lan phuong
phuong dan » phuong danh, phuong doan, huong dan
sinh van » sinh vat, dinh van, sinh va
dan phan » doan phan, dan chan, van phan
phan lap » phan dau
van dan » van ban, ban dan, 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: hoc ((thieu sach) or (chieu sach)) - nhan sinh van dan phuong dan phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - nhan sinh van dan phuong dan phan lap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (chieu sach)) - nhan sinh van dan phuong dan phan lap*.