Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
tiep danh » tieu danh, thien danh, tiep can
trung dap » trung cap, trung dai, trung dam
dap nhung » vap nhung, va nhung, dap ung
cong san » cong tac
tran tap » tran tan, tran tuan, trang tai
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: theo ((dieu hanh) or (tiep danh)) - thanh trung dap nhung cong san ((tran tap) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (tiep danh)) - thanh trung dap nhung cong san ((tran tap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((dieu hanh) or (tiep danh)) - thanh trung dap nhung cong san ((tran tap) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (tiep danh)) - thanh trung dap nhung cong san ((tran tap) OR (toan tap))*.