Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
va dung » van dung, va duong, vat dung
y lang » o lang, _ lang, tay lang
cuc te » cua te, cuc thue, cuc tieu

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 y lang xa hoi. hieu qua ((cam duc) OR (cao duc)) va dung tai cuc te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu qua ((cam duc) OR (cao duc)) va dung tai cuc te".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu qua ((cam duc) OR (cao duc)) va dung tai cuc te*.