Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
va hanh » van hanh, va danh, ban hanh
su sach » so sach, vu sach
cam loc » cam lo
hieu ve » hieu van
y nang » ky nang, ly nang, v nang
sua va » suat va, vua va, xua va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x hoi. ((hieu ve) or (hieu va)) cam loc ((va hanh) OR (va thanh)) sua va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. ((hieu ve) OR (hieu va)) cam loc ((va hanh) OR (va thanh)) sua va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. ((hieu ve) or (hieu va)) cam loc ((va hanh) OR (va thanh)) sua va triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. ((hieu ve) or (hieu va)) cam loc ((va hanh) OR (va thanh)) sua va triet*.