Perhaps you should try some spelling variations:
cam truc » cau truc, nam truc, lam truoc
so sinh » so sanh, so tinh, cho sinh
danh vi » dinh vi, danh di, danh va
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
ca viet » va viet, co viet, hoa viet
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
y nang » ky nang, v nang, may nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sinh ((y nang) OR (ly nang)) ma hoi. hieu va cam truc va ((danh vi) OR (hanh vi)) ca viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sinh ((y nang) or (ly nang)) ma hoi. hieu va cam truc va ((danh vi) OR (hanh vi)) ca viet~".
• Adding a wildcard symbol may retrieve word variants: so sinh ((y nang) or (ly nang)) ma hoi. hieu va cam truc va ((danh vi) OR (hanh vi)) ca viet*.