Perhaps you should try some spelling variations:
thanh vinh » thanh binh, thanh tinh, than kinh
vinh cua » sinh cua, tinh cua, dinh cua
quan va » quan vi, luan va, quan ve
quan ha » quan he
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
nang ro » nang co, nang ho, nang ra
va nam » van nam, ha nam, va nay
nang o » nang co, nang ho, nang x

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang o) OR (nang ro)) hoi. lieu va nam ((quan va) or (quan ha)) thanh vinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang o) OR (nang ro)) hoi. lieu va nam ((quan va) OR (quan ha)) thanh vinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang o) OR (nang ro)) hoi. lieu va nam ((quan va) or (quan ha)) thanh vinh cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang o) OR (nang ro)) hoi. lieu va nam ((quan va) or (quan ha)) thanh vinh cua tre*.