Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
nang doc » nang luc
cuu tre » cua tre, cau tren, cau treo
duc van » duc va, duc tan, duc manh
nang ho » nang hoc, nang co, tang ho
tri cuu » tri cua, tra cuu, trinh cuu
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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 ho) or (nang doc)) hai. hieu ve cac ((xuc ban) or (duc van)) hanh tri cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ho) OR (nang doc)) hai. hieu ve cac ((xuc ban) OR (duc van)) hanh tri cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang ho) or (nang doc)) hai. hieu ve cac ((xuc ban) or (duc van)) hanh tri cuu tre*.