Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
lang xa » dang xay, lang van
lang ha » long ha
va cham » va chat, va tham
soc van » hoc van, oc van, sac van
doi cua » hoi cua
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((lang xa) or (lang ha)) hoi. lieu va cham soc van hanh ((doi cua) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((lang xa) OR (lang ha)) hoi. lieu va cham soc van hanh ((doi cua) OR (dai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu san ky ((lang xa) or (lang ha)) hoi. lieu va cham soc van hanh ((doi cua) or (dai cua)) triet*.