Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
thanh toan » thanh hoa, thanh san, tinh toan
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
hieu van » hieu va, thien van, lieu va
luc dang » luc sang, luc dong, luoc danh
toan cua » than cua, tan cua, doanh cua
cua viet » ca viet, hoa viet, cua vat
lang xa » lang ha, dang xay, lang van
van cau » van dau, van hau, van chat
cau luc » cau truc, cau phuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach thu) OR (sach thue)) lang xa hoi. hieu van cau luc dang thanh toan cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach thu) OR (sach thue)) lang xa hoi. hieu van cau luc dang thanh toan cua viet".
• Adding a wildcard symbol may retrieve word variants: vu ((sach thu) OR (sach thue)) lang xa hoi. hieu van cau luc dang thanh toan cua viet*.