Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vu sach » su sach, vu khach
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
bach » cach, bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (vu bach)) ly nang xa hoi. hieu va cham ((luc va) or (tuc xa)) hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) ly nang xa hoi. hieu va cham ((luc va) OR (tuc xa)) hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu bach)) ly nang xa hoi. hieu va cham ((luc va) or (tuc xa)) hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu bach)) ly nang xa hoi. hieu va cham ((luc va) or (tuc xa)) hanh vi cua triet*.