Perhaps you should try some spelling variations:
tham hoc » thai hoc, tham hoa, than hoc
thanh te » thanh ve, thanh de, thanh le
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
hoc gia » hoc giao, hoc giai, toc gia
cua tre » cua te, cuu tre, cua triet
ve cac » vien cac
te cua » tue cua, le cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ve cac) OR (va cac)) ((ky lang) or (ky nang)) xa hoi. hieu va tham hoc gia thanh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ve cac) OR (va cac)) ((ky lang) OR (ky nang)) xa hoi. hieu va tham hoc gia thanh te cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ve cac) OR (va cac)) ((ky lang) or (ky nang)) xa hoi. hieu va tham hoc gia thanh te cua tre".
• Adding a wildcard symbol may retrieve word variants: ((ve cac) OR (va cac)) ((ky lang) or (ky nang)) xa hoi. hieu va tham hoc gia thanh te cua tre*.