Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
vu sach » vu bach, su sach, vu khach
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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 ly nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) or (tuc va)) hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) OR (tuc va)) hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ly nang xa hoi. ((hieu ve) OR (hieu va)) cam ((luc va) or (tuc va)) hanh vi cua triet*".