Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong tan, truong thanh
trung dap » trung cap, trung dai, trung dam
dap nhung » vap nhung, va nhung, dap ung
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh trung dap nhung ((cong thanh) or (cong trinh)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung dap nhung ((cong thanh) OR (cong trinh)) phan cac.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung dap nhung ((cong thanh) or (cong trinh)) phan cac*.