Perhaps you should try some spelling variations:
thanh toan » thanh hoa, tinh toan
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
ca tren » cau tren, cu tren, la tren
hanh xu » hanh tu, hanh sua, hanh cua
tu hanh » du hanh, lu hanh, thuc hanh
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
xu hoi » xa hoi, lu hoi, vu hoi

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 hanh xu hoi. hieu ((ve cam) or (ve cac)) xuc va ((thanh toan) OR (thanh san)) ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu hanh xu hoi. hieu ((ve cam) OR (ve cac)) xuc va ((thanh toan) OR (thanh san)) ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu hanh xu hoi. hieu ((ve cam) or (ve cac)) xuc va ((thanh toan) OR (thanh san)) ca tren".
• Adding a wildcard symbol may retrieve word variants: te sach tu hanh xu hoi. hieu ((ve cam) or (ve cac)) xuc va ((thanh toan) OR (thanh san)) ca tren*.