Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
lang van » dang van, tang van, hoang van
cham hoc » cham soc, chat hoc, cham hoi
vu cham » va cham, vu kham, tu cham
ban cua » ban quan
san cua » sang cua, dan cua, nan cua
hoc van » hoc dan, hoc va, hoc vat
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((lang xa) OR (lang van)) hoi. hieu vu cham hoc van thanh ((san cua) or (ban cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((lang xa) OR (lang van)) hoi. hieu vu cham hoc van thanh ((san cua) OR (ban cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((lang xa) OR (lang van)) hoi. hieu vu cham hoc van thanh ((san cua) or (ban cua)) tre*".