Perhaps you should try some spelling variations:
truc cac » tuc cac, truc cau, truoc cach
dung dat » dung va, dung tai
so sang » so sanh, so dang, so lang
sang ky » sang kyo, dang ky, tang ky
nang xa » lang xa, nang ma, mang xa
dan dat » dong dat, dinh dat, dan hoat
va cau » van cau, va cac, va dau
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sang ky ((nang xa) or (nang x)) hoi. lieu va cau truc cac ((dan dat) OR (dung dat)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sang ky ((nang xa) OR (nang x)) hoi. lieu va cau truc cac ((dan dat) OR (dung dat)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sang ky ((nang xa) or (nang x)) hoi. lieu va cau truc cac ((dan dat) OR (dung dat)) cua te".
• Adding a wildcard symbol may retrieve word variants: so sang ky ((nang xa) or (nang x)) hoi. lieu va cau truc cac ((dan dat) OR (dung dat)) cua te*.