Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
hoc thieu » hoc hien
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (hoc thieu)) sach - hanh ((trinh vat) or (trinh toan)) dung cong van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (hoc thieu)) sach - hanh ((trinh vat) OR (trinh toan)) dung cong van toan tap.
• Adding a wildcard symbol may retrieve word variants: ((toc thieu) or (hoc thieu)) sach - hanh ((trinh vat) or (trinh toan)) dung cong van toan tap*.