Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
luu tre » luu tru, cuu tre, luy tre
nang ma » tang ma, sang ma, mang may
san ty » san tay, van ty
ve cac » va cac, vien cac
vi luu » vi lua
ve cau » ke cau, va cau, le cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat san ty ((nang ma) OR (nang cao)) hoi. hieu ((ve cau) or (ve cac)) luc van hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ty ((nang ma) OR (nang cao)) hoi. hieu ((ve cau) OR (ve cac)) luc van hanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san ty ((nang ma) OR (nang cao)) hoi. hieu ((ve cau) or (ve cac)) luc van hanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: thuat san ty ((nang ma) OR (nang cao)) hoi. hieu ((ve cau) or (ve cac)) luc van hanh vi luu tre*.