Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh thuc » trinh tu, trinh thi
khoan phap » khoan phai, khoa phau, han phap
phap thong » phap phong, phap chong, pho thong
hoi thong » hoi thuong, hoi trong, hoa thong
sach tri » sach tai, sach tren, sach truc
cac khoa » cac khoi, dac khoa, cao khoa
khoa hoi » khoan hoi, khoa hoc, khoa doi
toc hanh » hoc hanh, doc hanh, tuc hanh
thuc cac » thuc cach, tuc cac, phuc cac
so sach » so sanh, bo sach, co sach
tri te » tri tue, tri le, tri ve
te cac » tu cac, ve cac, te cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach tri te cac khoa hoi thong ) or ( toc hanh trinh thuc cac khoan phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach tri te cac khoa hoi thong ) OR ( toc hanh trinh thuc cac khoan phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach tri te cac khoa hoi thong ) or ( toc hanh trinh thuc cac khoan phap thong ))*.