Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
tu sach » thu sach, su sach, tu cach
te sach » toc sach
hieu va » lieu va, hieu qua
van anh » tuan anh, van minh
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) y nang o hoi. hieu va cam xuc ((van anh) OR (van thanh)) dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang o hoi. hieu va cam xuc ((van anh) OR (van thanh)) dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y nang o hoi. hieu va cam xuc ((van anh) OR (van thanh)) dai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang o hoi. hieu va cam xuc ((van anh) OR (van thanh)) dai cua te*.