Perhaps you should try some spelling variations:
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tao thiet » tai thiet, tay thiet, toan thiet
hanh tram » hanh tam, hanh trang, thanh tran
van dung » van dong, tin dung
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)) tach - hanh tram ((van dung) OR (xay dung)) cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (tao thiet)) tach - hanh tram ((van dung) OR (xay dung)) cong tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (tao thiet)) tach - hanh tram ((van dung) OR (xay dung)) cong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (tao thiet)) tach - hanh tram ((van dung) OR (xay dung)) cong tan toan ban*.