Perhaps you should try some spelling variations:
thien tinh » khien tinh, thien minh, tien tinh
trung hoct » trung hoa, truong hoc, trong hoc
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
trung hoc » trung quoc
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 - hanh ((trung hoc) or (trung hoct)) nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien tinh - hanh ((trung hoc) OR (trung hoct)) nhung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thien tinh - hanh ((trung hoc) or (trung hoct)) nhung cong dan toan cao*.