Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
sach v » sach va, sach y, sach 2
xuc va » duc va, tuc va, luc va
v nang » va nang, vu nang, van nang

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 v nang xa hoi. ((hieu va) or (lieu va)) cam xuc va hanh di ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang xa hoi. ((hieu va) OR (lieu va)) cam xuc va hanh di ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang xa hoi. ((hieu va) or (lieu va)) cam xuc va hanh di ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: te sach v nang xa hoi. ((hieu va) or (lieu va)) cam xuc va hanh di ((cua triet) OR (va triet))*.