Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
nang xa » nang x, lang xa, nang ma
cham so » cham soc, cham o, ham so
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
so gia » so giai, so giao, ho gia
ve cau » ke cau, va cau, ve cac
ve cu » ve chu, ve cua, ve cum

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 nang xa hoi. ((hieu van) or (thien van)) cham so gia thanh ((ve cu) OR (ve cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. ((hieu van) OR (thien van)) cham so gia thanh ((ve cu) OR (ve cau)) tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. ((hieu van) or (thien van)) cham so gia thanh ((ve cu) OR (ve cau)) tren*".