Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hang hai » hoang hai, hang tai, thanh hai
hang vai » hang va, hang tai, hang vi
hieu van » hieu va, thien van, lieu va
cau cua » cau qua, ca cua, cu cua
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
me hoi » le hoi

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 ky nang ((me hoi) or (ma hoa)). hieu van cau cua ban ((hang vai) OR (hang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((me hoi) OR (ma hoa)). hieu van cau cua ban ((hang vai) OR (hang hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((me hoi) or (ma hoa)). hieu van cau cua ban ((hang vai) OR (hang hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((me hoi) or (ma hoa)). hieu van cau cua ban ((hang vai) OR (hang hai)) cua tre*.