Perhaps you should try some spelling variations:
may trinh » may tinh, lap trinh, quy trinh
trinh vi » trinh va, trinh ve, trinh viet
su sach » so sach, vu sach
ty dang » ty xang, ky dang, ty dong
ty hang » ly hang, ty xang, thi hang
cam luc » cam xuc, cau luc
luc may » truc may, phuc may
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty dang) or (ty hang)) xa hoi. lieu va cam luc may trinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty dang) OR (ty hang)) xa hoi. lieu va cam luc may trinh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ty dang) or (ty hang)) xa hoi. lieu va cam luc may trinh vi cua tre*.