Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thu cac » tu cac, thu cuc, thu dac
vuc van » duc van, luc van, thuc van
va cham » va chat, va tham
vu cham » vu kham, tu cham, qua cham
tang ha » lang ha, tang ma, trung ha
ky tang » ky nang, ky dang, kho tang
thu xac » thau xay
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: ((thu cac) or (thu xac)) ky tang ha noi. hieu ((vu cham) or (va cham)) vuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu cac) OR (thu xac)) ky tang ha noi. hieu ((vu cham) OR (va cham)) vuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu cac) or (thu xac)) ky tang ha noi. hieu ((vu cham) or (va cham)) vuc van hanh vi cua tre*.