Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sach » chinh sach, chiet tach, chieu sang
hanh phan » thanh phan, anh phan, hanh han
va phuong » va thuong, cac phuong
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan
than tap » toan tap, phan tap, than cap
anh han » anh nhan, anh phan, hanh han
han tap » han tai, toan tap, nhan tai

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 - ((anh han) or (hanh phan)) va phuong cong dan ((than tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((anh han) OR (hanh phan)) va phuong cong dan ((than tap) OR (han tap)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((anh han) or (hanh phan)) va phuong cong dan ((than tap) or (han tap))*.