Perhaps you should try some spelling variations:
may trinh » may tinh, lap trinh, quy trinh
trinh vat » trinh van, trinh luat, sinh vat
thu sach » tu sach, thuat sach, thuoc sach
hach xuc » thach duc, hanh xu, mach xu
sach ky » sac ky, sach y, sach ty
cach xu » cach tu, cach su, mach xu
cuu tre » cua tre, cau tren, cau treo
cua te » cua tu
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: thu sach ky nang x hoi. dieu khien ((hach xuc) OR (cach xu)) may trinh vat ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. dieu khien ((hach xuc) OR (cach xu)) may trinh vat ((cuu tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. dieu khien ((hach xuc) OR (cach xu)) may trinh vat ((cuu tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. dieu khien ((hach xuc) OR (cach xu)) may trinh vat ((cuu tre) or (cua te))*.