Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
nang co » nang cao, nang doc, nang noi
nang ho » nang hoc, tang ho, nang cao
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, xuc ban
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
nang o » nang ro, nang x, lang o
ve cac » va cac, vien cac

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 ky ((((nang o) OR (nang ho))) or (nang co)) hoi. hieu ve cac xuc van hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((((nang o) OR (nang ho))) OR (nang co)) hoi. hieu ve cac xuc van hanh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((((nang o) OR (nang ho))) or (nang co)) hoi. hieu ve cac xuc van hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((((nang o) OR (nang ho))) or (nang co)) hoi. hieu ve cac xuc van hanh tri cua tre*.