Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
va trinh » van trinh, va tinh, lap trinh
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
cam luc » cam xuc, cau luc
ly hang » ly quang
ty dang » ty xang, ky dang, ty hang
cu tren » tu tren, dua tren
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va

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