Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
nang hang » nang sang, hang hang, cang thang
ho thiet » hoc thiet, hoa thiet, hoc thieu
so thiet » soc thiet, hoc thiet, hoa thiet
cong tan » cong tac, cong san, cong thanh
ran cau » van cau, can cau, tran chau
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho thiet) OR (so thiet)) tach - nang hang va nhung cong tan ((ran cau) OR (ban cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) OR (so thiet)) tach - nang hang va nhung cong tan ((ran cau) OR (ban cau))".
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) OR (so thiet)) tach - nang hang va nhung cong tan ((ran cau) OR (ban cau))*.