Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
thanh sinh » thanh binh, thanh tinh, thanh vinh
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hien hanh » dieu hanh
cua thong » cua thuong, cua khong, cua tong
cong tang » cong thang, cong tan, cong lang
sinh cua » manh cua, dinh cuu, sinh va
tang van » dang van, hoang van, trong van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hieu manh) or (hien hanh))) or (chieu tinh)) - thanh sinh cua thong cong tang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (hien hanh))) OR (chieu tinh)) - thanh sinh cua thong cong tang van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) or (hien hanh))) or (chieu tinh)) - thanh sinh cua thong cong tang van ban*.