Perhaps you should try some spelling variations:
tinh via » tinh gia, tinh va, tinh giao
vu sach » vu bach, su sach, vu khach
ky tang » ky dang, kho tang, ky trong
hieu ve » hieu va, hieu van
cau duc » cao duc, cau luc, chu duc
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ky tang) or (ky nang)) xa hoi. hieu ve cau duc va ((tinh via) OR (tinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky tang) OR (ky nang)) xa hoi. hieu ve cau duc va ((tinh via) OR (tinh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky tang) or (ky nang)) xa hoi. hieu ve cau duc va ((tinh via) OR (tinh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky tang) or (ky nang)) xa hoi. hieu ve cau duc va ((tinh via) OR (tinh vi)) cua tre*.