Perhaps you should try some spelling variations:
quan thanh » ban thanh, van thanh
thanh hai » thanh phan, thanh hoa, thanh san
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
hai chau » lai chau, ha chau, hat chau
hoc quan » hoc dan, tac quan, hoc phan
chau tre » chay tren, chau tho, cho tre
van cam » van nam, van lam, van cau
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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 nang) OR (v nang)) x hoi. hieu ((van cam) or (van chat)) hoc quan thanh hai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (v nang)) x hoi. hieu ((van cam) OR (van chat)) hoc quan thanh hai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) OR (v nang)) x hoi. hieu ((van cam) or (van chat)) hoc quan thanh hai chau tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) OR (v nang)) x hoi. hieu ((van cam) or (van chat)) hoc quan thanh hai chau tre*.