Perhaps you should try some spelling variations:
thu ban » thu hang
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
toan du » tran duc, toan cau
toan su » tan su, toan tu, toan cau
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
tu ban » te ban
ve dam » ven dam, ke dam, va dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang xa hoi. hieu ve dam ((tu ban) or (thu ban)) thanh ((toan su) OR (toan du)) tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. hieu ve dam ((tu ban) OR (thu ban)) thanh ((toan su) OR (toan du)) tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. hieu ve dam ((tu ban) or (thu ban)) thanh ((toan su) OR (toan du)) tien".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. hieu ve dam ((tu ban) or (thu ban)) thanh ((toan su) OR (toan du)) tien*.