Perhaps you should try some spelling variations:
khoa dung » hoc dung, khoa cong
tai khoa » da khoa, noi khoa
chat huu » pham huu
van hanh » van thanh, ban hanh, van anh
dung ha » dung va, dung he, dung khoa
hieu va » lieu va
huu van » cuu van, huu han, luu van
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tai khoa dung ha hoi. ((hieu va) or (hieu qua)) chat huu van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tai khoa dung ha hoi. ((hieu va) OR (hieu qua)) chat huu van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu tai khoa dung ha hoi. ((hieu va) or (hieu qua)) chat huu van hanh vi cua tre*.