Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
thanh dung » thanh duong, thanh tung, thanh hung
hien hanh » dieu hanh
tam huong » tam thuong, tay huong, tam duong
cong vang » cong lang, cong quang, cong ngang
dung tam » duong tam, dung tai, dung lam
cong van » cong san, song van, cong tan
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 ((thien thanh) or (hien hanh)) - thanh dung tam huong ((cong van) OR (cong vang)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - thanh dung tam huong ((cong van) OR (cong vang)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) or (hien hanh)) - thanh dung tam huong ((cong van) OR (cong vang)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (hien hanh)) - thanh dung tam huong ((cong van) OR (cong vang)) toan ban*.