Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
cao duc » dao duc, cao suc, giao duc
vai cua » dai cua, hai cua, lai cua
ly vang » ly hang, ly van, ly quang
vang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
cam duc » cam xuc, pham duc, nam duoc
cua te » cua tu

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 (thu sach)) ly vang xa hoi. hieu ve ((cam duc) or (cao duc)) van thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly vang xa hoi. hieu ve ((cam duc) OR (cao duc)) van thanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ly vang xa hoi. hieu ve ((cam duc) or (cao duc)) van thanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ly vang xa hoi. hieu ve ((cam duc) or (cao duc)) van thanh vai cua te*.