Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
san ty » san tay, van ty
ve cam » ve cham, ve cac, va cam
vi so » vi soi, vi mo, li so
va so » ma so, va su, va co

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 xa) or (nang x)) hoi. hieu ve cam xuc van hanh ((vi so) OR (va so)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ty ((nang xa) OR (nang x)) hoi. hieu ve cam xuc van hanh ((vi so) OR (va so)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san ty ((nang xa) or (nang x)) hoi. hieu ve cam xuc van hanh ((vi so) OR (va so)) viet".
• Adding a wildcard symbol may retrieve word variants: thuat san ty ((nang xa) or (nang x)) hoi. hieu ve cam xuc van hanh ((vi so) OR (va so)) viet*.