Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
ty hoang » huy hoang, thi hoang, duy hoang
thanh va » thanh van, hanh va, thanh ha
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
hac tac » cac tac, hoc tach, thac cac
van hac » van hoc, van ha, van hai
ty hang » ly hang, ty xang, thi hang
su tien » su kien, su hien, tu tieng
tac xa » tuc xa, tac da
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty hoang) or (ty hang)) o hai. hieu van hac tac xa ((thanh va) or (thanh toan)) su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty hoang) OR (ty hang)) o hai. hieu van hac tac xa ((thanh va) OR (thanh toan)) su tien.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty hoang) or (ty hang)) o hai. hieu van hac tac xa ((thanh va) or (thanh toan)) su tien*.