Perhaps you should try some spelling variations:
phuong tien » phuong trinh
dong phuong » duong phuong, dung phuong, dong huong
thong minh » thong tin, hoang minh
cong thong » cong thuong, cong trong, dong thong
giai cong » gia cong, giao cong, giai phong
gioi dong » gioi dang, gioi song, gioi trong
sach pha » sach phat, sach phap, sach nha
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
ve gioi » ve giai, vien gioi, van gioi
pha ve » phan ve
xa ke » ba ke, ca ke, xa me
va ke » va ky, va de, va le

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach pha ve gioi dong phuong tien ) or ( tu sach ((xa ke) OR (va ke)) giai cong thong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach pha ve gioi dong phuong tien ) OR ( tu sach ((xa ke) OR (va ke)) giai cong thong minh )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach pha ve gioi dong phuong tien ) or ( tu sach ((xa ke) OR (va ke)) giai cong thong minh ))".
• Adding a wildcard symbol may retrieve word variants: (( su sach pha ve gioi dong phuong tien ) or ( tu sach ((xa ke) OR (va ke)) giai cong thong minh ))*.