Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien danh » thien anh, thien dang, thien thanh
thong cong » trong cong, tong cong, thong thong
toc thien » toc thieu, ton thien, duoc thien
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
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: toc thien danh - thanh trung cua thong cong ((tinh toan) or (van than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thien danh - thanh trung cua thong cong ((tinh toan) OR (van than)) ban.
• Adding a wildcard symbol may retrieve word variants: toc thien danh - thanh trung cua thong cong ((tinh toan) or (van than)) ban*.