Perhaps you should try some spelling variations:
thanh tai » thanh toan, doanh tai, thanh san
thanh hai » thanh phan, thanh hoa, thanh san
cua viet » ca viet, hoa viet, cua vat
sach thu » sach thue, sach thieu, sach tham
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
hanh xa » hanh ma, hanh xu, canh xa
ve cac » va cac, vien cac

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