Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
thong cong » trong cong, tong cong, thong thong
chau tinh » cuu tinh, ha tinh, cua tinh
dung cong » dung trong
ban thanh » ban hanh, ban hang
hoc chau » hoc chat, moc chau, hoc cau
ban than » van thanh, ban hang, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chau tinh - hanh trinh quan ((thong cong) or (dung cong)) ((ban than) OR (ban thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chau tinh - hanh trinh quan ((thong cong) OR (dung cong)) ((ban than) OR (ban thanh)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chau tinh - hanh trinh quan ((thong cong) or (dung cong)) ((ban than) OR (ban thanh)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc chau tinh - hanh trinh quan ((thong cong) or (dung cong)) ((ban than) OR (ban thanh)) cao*.