Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hanh hang » thanh hang, hang hang, hanh han
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
than cau » toan cau, phan cau, than cap
phan lap » phan dau

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 va ((nhung cong) OR (thong cong)) van ((than cau) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - hanh hang va ((nhung cong) OR (thong cong)) van ((than cau) OR (phan lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - hanh hang va ((nhung cong) OR (thong cong)) van ((than cau) or (phan lap))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh hang va ((nhung cong) OR (thong cong)) van ((than cau) or (phan lap))*.