Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
van thanh » ban thanh, van tuan
nam duoc » nam thuoc, da duoc, dat duoc
tu sach » thu sach, su sach, te sach
ly vang » ly hang, ly van, ly quang
vang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
dao duc » giao duc, tao duoc
cuc te » cua te, cuc tieu
thue » thu, thuc, thuy

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