Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
sach truc » cach thuc, sach tren, sach thu
truc thuc » truc thuoc, thuc thuc, truc thuy
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa phap » khoa phau, khoan phai, khong phap
hoach tri » hoach toi, hoach hoi, hoach thu
thu thang » thu trang, thu hang, thu thanh
tue hang » te hang, lue zhang, thuy hang
khoa thu » khoa than, hoai thu, ho thu
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: (( tu sach truc thuc hang khoa phap thong ) or ( thu hoach tri tue hang khoa thu thang ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach truc thuc hang khoa phap thong ) OR ( thu hoach tri tue hang khoa thu thang )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach truc thuc hang khoa phap thong ) or ( thu hoach tri tue hang khoa thu thang ))*.