Perhaps you should try some spelling variations:
van trinh » van thinh, dan trinh, va trinh
van tinh » van thinh, van minh, ban tinh
su sach » so sach, vu sach
cam loc » cam lo
cua tre » cua te, cuu tre, cua triet
ty hang » ly hang, ty xang, thi hang
ty dang » ty xang, ky dang, ty dong
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao

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 loc ((van trinh) OR (van tinh)) 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 loc ((van trinh) OR (van tinh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty dang) or (ty hang)) xa hoi. lieu va cam loc ((van trinh) OR (van tinh)) vi cua tre*".