Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
cam duc » cao duc, pham duc, nam duoc
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang

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 ty lang xa hoi. hieu va ((cam duc) or (cam xuc)) van hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang xa hoi. hieu va ((cam duc) OR (cam xuc)) van hanh vi ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty lang xa hoi. hieu va ((cam duc) or (cam xuc)) van hanh vi ((cua triet) or (su triet))*.