Perhaps you should try some spelling variations:
ve triet » va trien, su triet
chau phu » chau phi, chau au, chau tho
chieu ke » hieu ky, hieu ve, hieu kem
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, vu khach
hieu ke » hieu kem, hieu ky, hieu ve
nang xa » nang x, lang xa, nang ma
su sach » so sach
y nang » ky nang, ly nang, v nang
phu va » phuc va, phu la, phu da
vi ve » va ve, gi ve, ve ve

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 (su sach)) y nang xa hoi. ((hieu ke) or (chieu ke)) chau phu va hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) y nang xa hoi. ((hieu ke) OR (chieu ke)) chau phu va hanh vi ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) y nang xa hoi. ((hieu ke) or (chieu ke)) chau phu va hanh vi ve triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) y nang xa hoi. ((hieu ke) or (chieu ke)) chau phu va hanh vi ve triet*.