Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
cuu tre » cau tren, cau treo
xay hoi » xa hoi, tay hoi, cay phoi
cua tre » cua te, cua triet, dua tren
hanh de » hanh ve, hanh kem
ky dang » ky nang, ky danh
luc van » luoc van, luu van, duc van
tai ky » thai ky, trai ky, sai ky
ve cau » ke cau, va cau, le cau
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: te tai ky dang xay hoi. hieu ((ve cau) or (ve cac)) luc van hanh de ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te tai ky dang xay hoi. hieu ((ve cau) OR (ve cac)) luc van hanh de ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te tai ky dang xay hoi. hieu ((ve cau) or (ve cac)) luc van hanh de ((cua tre) or (cuu tre))*.