Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
te sach » toc sach
cao duc » dao duc, cao suc, giao duc
dau sai » dau hai, dau tai, danh sai
cua tuc » cua duc, cua tu, cua thuoc
sach ky » sac ky, sach y, sach ty
cam duc » cam xuc, pham duc, nam duoc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu va ((cam duc) OR (cao duc)) va dau sai ((cua triet) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu va ((cam duc) OR (cao duc)) va dau sai ((cua triet) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu va ((cam duc) OR (cao duc)) va dau sai ((cua triet) or (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu va ((cam duc) OR (cao duc)) va dau sai ((cua triet) or (cua tuc))*.