Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach nay » sach hay, sach vay, sach nang
cua viet » ca viet, hoa viet, cua vat
quan ha » quan he
quan xa » quan va, quan cua, quan tai
va tinh » may tinh
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach nay ((quan xa) OR (quan ha)) hoi. hieu ve cam xuc ((gia thanh) or (va tinh)) ca cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach nay ((quan xa) OR (quan ha)) hoi. hieu ve cam xuc ((gia thanh) OR (va tinh)) ca cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach nay ((quan xa) OR (quan ha)) hoi. hieu ve cam xuc ((gia thanh) or (va tinh)) ca cua viet".
• Adding a wildcard symbol may retrieve word variants: thu sach nay ((quan xa) OR (quan ha)) hoi. hieu ve cam xuc ((gia thanh) or (va tinh)) ca cua viet*.