Perhaps you should try some spelling variations:
toan thiet » hoan thien, luan thiet, toan tien
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tao thiet » tai thiet, tay thiet, va thiet
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (((tao thiet) OR (toan thiet)))) tach - hanh trang cua nhung cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (((tao thiet) OR (toan thiet)))) tach - hanh trang cua nhung cong tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (((tao thiet) OR (toan thiet)))) tach - hanh trang cua nhung cong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (((tao thiet) OR (toan thiet)))) tach - hanh trang cua nhung cong tan toan ban*.