Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
bach qua » cac qua, bach hue, bach ha
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
va tinh » may tinh
tinh ha » tinh hai, tinh hoa, tinh va
cua tre » cua te, cuu tre, dua tren
qua va » quan va, qua van, vua va
tu ban » thu ban, te ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ((ky lang) OR (ky tang)) xa hoi. hieu hien bach qua va tinh ha ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ((ky lang) OR (ky tang)) xa hoi. hieu hien bach qua va tinh ha ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ((ky lang) OR (ky tang)) xa hoi. hieu hien bach qua va tinh ha ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu ban ((ky lang) OR (ky tang)) xa hoi. hieu hien bach qua va tinh ha ((cua tre) or (cua triet))*.