Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hang hai » hoang hai, hang tai, thanh hai
hanh hai » thanh hai, nhanh hai, hanh tai
te nuoc » te quoc, te duoc, ve nuoc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ky sang » ky dang, ky tang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa
ve te » le te, ve ke, ve tu

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 sang) or (ky nang)) ma hoi. hieu ve te nuoc va ((hanh hai) or (hang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky sang) OR (ky nang)) ma hoi. hieu ve te nuoc va ((hanh hai) OR (hang hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky sang) or (ky nang)) ma hoi. hieu ve te nuoc va ((hanh hai) or (hang hai)) cua tre*.