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 xu » hanh tu, hanh sua, hanh cua
ve cac » va cac, vien cac
xu hoi » xa hoi, lu hoi, vu hoi
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 xu 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 xu 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 xu hoi. hieu ((ve cai) or (ve cac)) xuc ban thanh tai cau tren*.