Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh vai » dinh van, dinh vi, dinh va
toc sach » hoc sach, doc sach, thuoc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
va dinh » van dinh, va kinh, va tinh
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
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: ((te sach) OR (toc sach)) ky lang xa hoi. hieu va cao tuc va dinh vai ((cua triet) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky lang xa hoi. hieu va cao tuc va dinh vai ((cua triet) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky lang xa hoi. hieu va cao tuc va dinh vai ((cua triet) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky lang xa hoi. hieu va cao tuc va dinh vai ((cua triet) or (cua tu))*.