Perhaps you should try some spelling variations:
phuong tien » phuong trinh
thong minh » thong tin, hoang minh
tai phuong » thi phuong, cac phuong, va phuong
can thong » ban thong, van thong, chan thuong
giai can » giai han, giai san, giai ca
sach cha » sach nha, sach che, sach ha
giai tai » giai bai, gia tai, gioi tai
de giai » dan giai, kem giai
tu sach » thu sach, su sach, te sach
ve giai » va giai, ve giao, kem giai
te cac » tu cac, ve cac, te cao
bai de » dai de, lai de, bai da
cha ve » cha me, ca ve, pha ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te cac bai de giai can thong minh ) or ( tu sach cha ve giai tai phuong tien ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te cac bai de giai can thong minh ) OR ( tu sach cha ve giai tai phuong tien )).
• Adding a wildcard symbol may retrieve word variants: (( te cac bai de giai can thong minh ) or ( tu sach cha ve giai tai phuong tien ))*.