Perhaps you should try some spelling variations:
phuong van » phung van, phong van, phuong lan
hoc thieu » toc thieu, hoc hien
minh tuan » anh tuan
van than » van thanh, van thang, van tuan
than ban » thanh ban, toan ban, than man
doi chi » doi khi
va doan » va doanh, van doan, va dan

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) or (doi chi)) sach - ((minh tuan) or (canh tranh)) va doan phuong van than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chi)) sach - ((minh tuan) OR (canh tranh)) va doan phuong van than ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chi)) sach - ((minh tuan) or (canh tranh)) va doan phuong van than ban*.