Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
tong thong » thong thong, dong thong, cong thong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua tong » cua cong, cua dong, cua nong
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (theo chieu)) tinh - thanh trung cua tong thong ((dan than) or (van than)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo chieu)) tinh - thanh trung cua tong thong ((dan than) OR (van than)) cap.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo chieu)) tinh - thanh trung cua tong thong ((dan than) or (van than)) cap*.