Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
cac luu » cac luat, sach luu
luu van » cuu van, luan van, luu hanh
hanh va » hang va, hanh vi
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac
va cuu » va cau, va chu, va huu

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 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 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 va cuu tre*.