Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dat tren » dat trong, dua tren
may hoi » may thoi, tay hoi, mai hoi
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
van anh » van thanh, van minh
y mang » cay mang
vi dat » voi dat, vi dai, va dat
tuan » quan, tran, luan

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 y mang may hoi. hieu va cac xuc ((van anh) or (tuan anh)) vi dat tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y mang may hoi. hieu va cac xuc ((van anh) OR (tuan anh)) vi dat tren.
• Adding a wildcard symbol may retrieve word variants: thu sach y mang may hoi. hieu va cac xuc ((van anh) or (tuan anh)) vi dat tren*.