Perhaps you should try some spelling variations:
cong thuong » hang thuong
thuat mach » thuat sach, thuat tach, thuyet mach
thuong tin » thuong tinh, thong tin, phuong tien
phong minh » thong minh, khong minh, phong tinh
mach cua » manh cua, menh cua, hanh cua
cua bien » cua ban, cua dieu, va bien
doi cong » doi song, noi cong, moi cong
sach dao » lanh dao
vu sach » vu bach, su sach, vu khach
ve gioi » ve giai, vien gioi, van gioi
o phong » mo phong, so phuong, voi phong
dao ve » bao ve, dap ve, dau ve
gioi o » gioi co, gioi _, gioi bon

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuat mach cua bien doi cong thuong tin ) or ( vu sach dao ve gioi o phong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat mach cua bien doi cong thuong tin ) OR ( vu sach dao ve gioi o phong minh )).
• Adding a wildcard symbol may retrieve word variants: (( thuat mach cua bien doi cong thuong tin ) or ( vu sach dao ve gioi o phong minh ))*.