Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
trinh quan » tinh quang, trinh han
hoc chieu » hoc thieu, ho chieu, hoc hien
cong cong » cong dong, trong cong, dung cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu tinh - hanh ((trinh quan) OR (trinh luat)) cong cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu tinh - hanh ((trinh quan) OR (trinh luat)) cong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh ((trinh quan) OR (trinh luat)) cong cong san toan ban*.