Perhaps you should try some spelling variations:
cac khoi » cac khoan, cach thoi, cac hop
van hanh » van thanh, ban hanh, van anh
hoc khoi » hoc khoa, hoc hoa, hoc noi
cac thoi » cac toi, cac hop, cac tro
tung dan » dung dan, huong dan, trung dai
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
dan hoi » dan hoc, dai hoi, van hoi
cua cau » cua cac, cua chu, cua cay
hieu vu » hieu va, hieu ve, hieu su
vu cam » vu cham, vu cao, va cam
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 khoi) or (hoc khoi))) or (cac thoi)) tung dan hoi. hieu vu cam duc van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((cac khoi) OR (hoc khoi))) OR (cac thoi)) tung dan hoi. hieu vu cam duc van hanh vi cua cau.
• Adding a wildcard symbol may retrieve word variants: tu ((((cac khoi) or (hoc khoi))) or (cac thoi)) tung dan hoi. hieu vu cam duc van hanh vi cua cau*.