Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
van hanh » van thanh, ban hanh, van ban
van anh » van thanh, tuan anh, van minh
cac luu » cac luat, sach luu
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
ma hoi » mai hoi, ma hoa, me hoi
va cuu » va cau, va chu, va huu
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: thuat lanh _ sang ((ma hoi) or (xa hoi)). hieu ve cac luu ((van hanh) OR (van anh)) va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh _ sang ((ma hoi) OR (xa hoi)). hieu ve cac luu ((van hanh) OR (van anh)) va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh _ sang ((ma hoi) or (xa hoi)). hieu ve cac luu ((van hanh) OR (van anh)) va cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuat lanh _ sang ((ma hoi) or (xa hoi)). hieu ve cac luu ((van hanh) OR (van anh)) va cuu tre*.