Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
hanh trinh » canh tranh, hanh chinh
trinh thi » trinh tai, dinh thi, trinh tu
cach khoa » bach khoa, cac khoa, cac khoan
pho thong » he thong
sach thai » sach tham, sac thai, sach tai
thai thuc » thai thuy, thai tuc, tham thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
khoa phau » hoa phan, khoa kham, khoa than
thu hanh » thuc hanh, thu thanh, thuy hanh
thi cach » thi bach, thi canh, tho cach
khoa pho » khoa phu, khoa khoa, khoa hoc
tu sach » thu sach, su sach, te sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hanh trinh thi cach khoa pho thong ) or ( tu sach thai thuc cach khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hanh trinh thi cach khoa pho thong ) OR ( tu sach thai thuc cach khoa phau thong ))*.