Perhaps you should try some spelling variations:
dong thanh » truong thanh
thanh toan » thanh hoa, thanh san, tinh toan
hang dong » hang nong, hang cong, hanh dong
cua tinh » va tinh, ha tinh, hoa tinh
cua sinh » hoa sinh, va sinh
trinh va » trinh van, trinh vat, trinh vi
trinh ve » trinh he, trinh vi, trinh viet
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thao ((cua tinh) OR (cua sinh)) - hanh ((trinh va) OR (trinh ve)) hang dong thanh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thao ((cua tinh) OR (cua sinh)) - hanh ((trinh va) or (trinh ve)) hang dong thanh toan cao~".
• Adding a wildcard symbol may retrieve word variants: thao ((cua tinh) OR (cua sinh)) - hanh ((trinh va) or (trinh ve)) hang dong thanh toan cao*.