Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien tinh » khien tinh, thien minh, tien tinh
trung quan » truong quan, trong quan, trung tuan
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
cong van » cong vang, cong san, song van
tan tap » toan tap, han tap, man tap
tan tat » ban tat, toan tap, toan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien tinh) or (tien thinh)) - thanh trung quan dung cong van ((tan tap) OR (tan tat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien tinh) OR (tien thinh)) - thanh trung quan dung cong van ((tan tap) OR (tan tat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien tinh) or (tien thinh)) - thanh trung quan dung cong van ((tan tap) OR (tan tat))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien tinh) or (tien thinh)) - thanh trung quan dung cong van ((tan tap) OR (tan tat))*.