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
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cua tre » cuu tre, cua triet, dua tren
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
nang o » nang ho, nang ro, nang x
ve cac » va cac, vien cac
cua te » cua tu

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