Perhaps you should try some spelling variations:
qua cham » qua hai, va cham, qua cua
cua tre » cua te, cuu tre, cua triet
qua cac » cua cac
dua ban » dia ban, cua ban, qua ban
duc ban » duc tan, duc van, duc man
nang co » nang cao, nang doc, nang noi
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
anh do » anh doc, anh d, anh co
do cua » doi cua, co cua, de cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang co hoi. hieu ((qua cham) OR (qua cac)) ((duc ban) or (dua ban)) anh do cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang co hoi. hieu ((qua cham) OR (qua cac)) ((duc ban) OR (dua ban)) anh do cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang co hoi. hieu ((qua cham) OR (qua cac)) ((duc ban) or (dua ban)) anh do cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang co hoi. hieu ((qua cham) OR (qua cac)) ((duc ban) or (dua ban)) anh do cua tre*.