Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
luoc van » luoc va, luc van, luot van
luoc can » luc canh, hoc can, luoc dai
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham

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