Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
tinh viec » tinh viet, dinh viec, sinh viec
hieu van » hieu va, thien van, lieu va
van nang » van quang, van ban, van dong
nang duc » nang luc, nang doc, nang du
va triet » va thiet, va trien, ve triet
sang ky » sang kyo, dang ky, tang ky
nang xa » nang x, lang xa, nang ma
va tinh » may tinh
san ky » van ky, dan ky, ban 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) or (sang ky)) nang xa hoi. hieu van nang duc va tinh viec ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (sang ky)) nang xa hoi. hieu van nang duc va tinh viec ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) or (sang ky)) nang xa hoi. hieu van nang duc va tinh viec ((cua triet) or (va triet))*.