Perhaps you should try some spelling variations:
trong hach » trong mach, trong cach, trong hanh
hach toan » thanh toan, manh toan
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
mang cua » manh cua, dung cua, ban cua
toan ban » van ban
hang ca » hang va, nang cao, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - hanh ((hang ca) or (mang cua)) dung trong hach toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - hanh ((hang ca) OR (mang cua)) dung trong hach toan ban.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh ((hang ca) or (mang cua)) dung trong hach toan ban*.