Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
tu cach » tu cac
hanh li » nhanh li, hanh vi, han li
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
ca viet » va viet, co viet, hoa viet
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho
li ca » ly ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) y nang x hoi. ((hieu van) or (hieu va)) cam luc va hanh li ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) y nang x hoi. ((hieu van) OR (hieu va)) cam luc va hanh li ca viet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) y nang x hoi. ((hieu van) or (hieu va)) cam luc va hanh li ca viet*.