Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
than cua » nhan cua, thai cua, ban cua
van hanh » van thanh, ban hanh, van anh
nang hoc » nang doc, nang luc, dong hoc
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
nang ho » nang co, tang ho, nang cao
ve cac » va cac, vien cac
tu can » tu ban, tu cac, thu canh
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu can)) ky ((nang ho) OR (nang hoc)) lai. hieu ve cac duc van hanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu can)) ky ((nang ho) OR (nang hoc)) lai. hieu ve cac duc van hanh than cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu can)) ky ((nang ho) OR (nang hoc)) lai. hieu ve cac duc van hanh than cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu can)) ky ((nang ho) OR (nang hoc)) lai. hieu ve cac duc van hanh than cua tre*.