Perhaps you should try some spelling variations:
thuat mach » thuat sach, thuat tach, thuyet mach
nguoi cong » nguoi muong, nguoi thong, nguoi nung
cong thong » cong thuong, cong trong, dong thong
thuoc sach » hoc sach, nuoc sach, thuat sach
lay nguoi » tay nguoi, lam nguoi, ly nguoi
con thong » con hong, cong thuong, toan thong
mach cua » manh cua, menh cua, hanh cua
sach cha » sach nha, sach che, sach ha
giai con » gian con, giai doan, giao cong
cua lay » cua cay, cua lam, cua lao
ve giai » va giai, ve giao, de giai
cha ve » cha me, ca ve, pha ve

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 lay nguoi cong thong tin ) or ( thuoc sach cha ve giai con thong tin ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat mach cua lay nguoi cong thong tin ) OR ( thuoc sach cha ve giai con thong tin )).
• Adding a wildcard symbol may retrieve word variants: (( thuat mach cua lay nguoi cong thong tin ) or ( thuoc sach cha ve giai con thong tin ))*.