Perhaps you should try some spelling variations:
bang hanh » bang thanh, ban hanh, bang hinh
cac khoa » cac khoan, cac khoi, dac khoa
tang van » dang van, hoang van, trong van
cac kho » cac khoi, cac khu, cac ho
so bang » so dang, so lang, co bang
cham so » cham soc, cham o, ham so
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
tang ma » mang may
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 ((cac kho) OR (cac khoa)) ((tang ma) or (tang van)) hoi. hieu ve cham so bang hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cac kho) OR (cac khoa)) ((tang ma) OR (tang van)) hoi. hieu ve cham so bang hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((cac kho) OR (cac khoa)) ((tang ma) or (tang van)) hoi. hieu ve cham so bang hanh vi cua tre*".