Perhaps you should try some spelling variations:
thanh tra » thanh toan, thanh hoa
van thanh » ban thanh, van tuan
dua tren » dung tren
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
co hai » co dai, co hoi, o hai
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 sach ky nang co hai. hieu ve cac duc van thanh tra ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang co hai. hieu ve cac duc van thanh tra ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang co hai. hieu ve cac duc van thanh tra ((dua tren) or (cuu tre))*.