Perhaps you should try some spelling variations:
tinh cao » tinh lao, tinh chat, tinh cach
cua tre » cua te, cuu tre, cua triet
cac lop » cac hop, cac loai
cao cua » ca cua, co cua, cau cua
va tinh » may tinh
cac loc » cac toc, cac hoc, cac nuoc
hieu ve » hieu va, hieu van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
vu sac » vu sach, vu san, va sac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky lang ((van hoc) OR (van hoa)). hieu ve ((cac loc) or (cac lop)) va tinh cao cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky lang ((van hoc) OR (van hoa)). hieu ve ((cac loc) OR (cac lop)) va tinh cao cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky lang ((van hoc) OR (van hoa)). hieu ve ((cac loc) or (cac lop)) va tinh cao cua tre*".