Perhaps you should try some spelling variations:
khien hach » thien hach, khien thich, hien hanh
xach tay » canh tay
hach xuc » thach duc, hanh xu, cach xu
sach tu » sach thu, cach tu, sach ty
xuc may » xuc hay, truc may, phuc may
tinh va » tich va, trinh van, trinh vat
chu tre » cho tre, chu tri, cuu tre
va chu » va che, va cau, va chi
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((xach tay) or (sach tu)) nang x hoi. dieu khien hach xuc may tinh va chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((xach tay) OR (sach tu)) nang x hoi. dieu khien hach xuc may tinh va chu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (sach tu)) nang x hoi. dieu khien hach xuc may tinh va chu tre*.