Perhaps you should try some spelling variations:
ban tinh » ban thanh, quan tinh, ban hanh
cham cua » chat cua, cham cuu, ham cua
tu cach » tu cac
cua tre » cuu tre, cua triet, dua tren
tinh vi » trinh vi, tinh voi, tinh va
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
cua te » cua tu

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 (te sach)) ky lang ha noi. hieu ve cham cua ban tinh vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky lang ha noi. hieu ve cham cua ban tinh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky lang ha noi. hieu ve cham cua ban tinh vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky lang ha noi. hieu ve cham cua ban tinh vi ((cua tre) OR (cua te))*.