Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
cach thuc » anh thuc, cac thu
thuc tiep » thuc tien, truc tiep, thuc hien
nuoc bach » nuoc sach, ngoc bich, cuoc cach
bach khoa » anh khoa
pho thong » he thong
tiep cau » tiep can, thien cau, diem cau
hoi phau » hoi phan, hoi phu, khoa phau
sach tai » sach bai, sach tham, sach dao
tai nuoc » tai quoc, thi nuoc, tham nuoc
khoa pho » khoa phu, khoa khoa, khoa phau
su cach » su sach, tu cach, su cac
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su cach thuc tiep cau hoi phau thong ) or ( te sach tai nuoc bach khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su cach thuc tiep cau hoi phau thong ) OR ( te sach tai nuoc bach khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( su cach thuc tiep cau hoi phau thong ) or ( te sach tai nuoc bach khoa pho thong ))*.