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