Perhaps you should try some spelling variations:
phau phuong » phap phuong, phan thuong, pham thuong
phuong tien » phuong trinh
giai phau » giai phap
gian doan » gian dan, giai doan, gian don
te sach » toc sach
ve giai » va giai, ve giao, de giai
sach ha » sach han, sach xa, bach ha
me gian » me giai, ma giang
nha ve » nhat ve, nhan ve, nha va
ha me » cha me, ba me, ha le

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach nha ve giai phau phuong tien ) OR ( te sach ha me gian doan phuong tien ))~.
• Adding a wildcard symbol may retrieve word variants: (( te sach nha ve giai phau phuong tien ) or ( te sach ha me gian doan phuong tien ))*.