Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
sang ky » sang kyo, dang ky, tang ky
lang ha » long ha
va cham » va chat, va tham
luc van » luoc van, luu van, duc van
hanh di » hanh vi, hanh de, hang di
san ky » van ky, dan ky, ban ky
ha hoi » hoa hoi, ha noi, xa hoi
di su » doi su, ki su, da su

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

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