Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
su sach » so sach, vu sach
cao duc » dao duc, cao suc, giao duc
ly vang » ly hang, ly van, ly quang
vang xa » lang xa, mang xa, ang xa
hieu ve » hieu van
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
cam duc » cam xuc, pham duc, nam duoc
cua tu » cua tuc, cua su, cua cu

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

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