Perhaps you should try some spelling variations:
phau thuong » phan thuong, pham thuong, khau thuong
hanh trinh » canh tranh, hanh chinh
sach tien » sach tren, sach thieu
tien thuc » trien thuc, kien thuc, bien thuc
khoa phau » hoa phan, khoa kham, khoa than
trinh cuu » trinh cau, trinh cua, trinh chu
dan thong » dan trong, ban thong, dan phong
thuc cac » thuc cach, tuc cac, phuc cac
cac khoa » cac khoan, cac khoi, dac khoa
cuu cach » cuu cac, cuoc cach, cuu dac
cach hoc » cach thuc, cach thoi, dich hoc
su sach » so sach, vu sach
tu hanh » du hanh, lu hanh, thuc hanh

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 tien thuc cac khoa phau thuong ) or ( tu hanh trinh cuu cach hoc dan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tien thuc cac khoa phau thuong ) OR ( tu hanh trinh cuu cach hoc dan thong ))*.