Perhaps you should try some spelling variations:
thanh do » thanh de, thanh pho, thanh hoa
thanh di » thanh doi, thanh de, thanh dinh
hieu van » hieu va, thien van, lieu va
nam xuc » cam xuc, nam xua, nam thuc
xuc va » duc va, tuc va, luc va
sac ky » cac ky, sai ky
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (sach y)) nang x hoi. hieu van nam xuc va ((thanh di) OR (thanh do)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (sach y)) nang x hoi. hieu van nam xuc va ((thanh di) OR (thanh do)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (sach y)) nang x hoi. hieu van nam xuc va ((thanh di) OR (thanh do)) cua te*".