Perhaps you should try some spelling variations:
thi nang » thi cong, ki nang, thi hanh
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
su triet » su viet, su tien, ve triet
te sach » toc sach
ty hang » ly hang, ty xang, thi hang
van cac » van hac, van cau, van bac
cac luc » cau luc, coc luc, cac nuoc
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho
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: te sach ((ty hang) or (thi nang)) x hoi. hieu van cac luc va thanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty hang) OR (thi nang)) x hoi. hieu van cac luc va thanh di su triet.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty hang) or (thi nang)) x hoi. hieu van cac luc va thanh di su triet*.