Perhaps you should try some spelling variations:
phuong tin » phuong tien, thuong tin, phuong trinh
tai phuong » thi phuong, cac phuong, va phuong
thu sach » tu sach, thuat sach, thuoc sach
sach cha » sach nha, sach che, sach ha
giai tai » giai bai, gia tai, gioi tai
va thong » va thuong, va phuong, he thong
de giai » dan giai, kem giai
gioi va » gioi van, giai va, gio va
cha de » cha me, chat deo, cham den
cha ve » cha me, pha ve, cha va
ca ve » ca va, va ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu sach cha de giai tai phuong tin ) or ( thu sach ((cha ve) or (ca ve)) gioi va thong tin ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach cha de giai tai phuong tin ) OR ( thu sach ((cha ve) OR (ca ve)) gioi va thong tin )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach cha de giai tai phuong tin ) or ( thu sach ((cha ve) or (ca ve)) gioi va thong tin ))*.