Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
nhan luc » nang luc
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, xach tay
lang xa » lang ha, dang xay, lang van
luc ban » duc ban, cuc ban, luc bat
van cau » van dau, van hau, van chat

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

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