Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
cau tren » cu tren, dau tren, ca tren
sach thu » sach thue, sach thieu, sach tham
tai cau » tai cac, tai cao
xuc ban » duc ban, cuc ban, quoc ban
sach tu » cach tu, sach ty, sach uu
hanh xa » hanh va, hanh ma, hanh xu
ve cac » va cac, vien cac
ve cai » va cai, ve tai, ve cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach tu) OR (sach thu)) hanh xa hoi. hieu ((ve cai) or (ve cac)) xuc ban thanh tai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach thu)) hanh xa hoi. hieu ((ve cai) OR (ve cac)) xuc ban thanh tai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) OR (sach thu)) hanh xa hoi. hieu ((ve cai) or (ve cac)) xuc ban thanh tai cau tren".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) OR (sach thu)) hanh xa hoi. hieu ((ve cai) or (ve cac)) xuc ban thanh tai cau tren*.