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