Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
bang hanh » bang thanh, ban hanh, bang hinh
kho tang » cao tang
ky tang » ky nang, ky dang, ky trong
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cham so » cham soc, cham o, ham so
so bang » so dang, so lang, co bang
cua tre » cua te, cuu tre, dua tren

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: tu cac ((ky tang) OR (kho tang)) ma hoa. hieu va cham so bang hanh vi ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ((ky tang) or (kho tang)) ma hoa. hieu va cham so bang hanh vi ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu cac ((ky tang) or (kho tang)) ma hoa. hieu va cham so bang hanh vi ((cua tre) OR (cua triet))*.