Perhaps you should try some spelling variations:
phau phuong » phap phuong, phan thuong, pham thuong
phuong tien » phuong trinh
dan phuong » doan phuong, van phuong, lan phuong
giai phau » giai phap
giang dan » gian dan, giang day, giang van
ma giang » ha giang, ca giang, manh giang
te sach » toc sach
ve giai » va giai, ve giao, de giai
sach ha » sach han, sach xa, bach ha
nha ve » nhat ve, nhan ve, nha va
ha ma » ham ma, ha my, ha pa

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 ma giang dan phuong tien ))~.
• Adding a wildcard symbol may retrieve word variants: (( te sach nha ve giai phau phuong tien ) or ( te sach ha ma giang dan phuong tien ))*.