Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh truong » hanh trong, anh truong, manh truong
truong cua » truong ca, truong quan, truong cao
duong van » luong va, dang van, trong van
cua tong » cua cong, cua dong, cua nong
duong va » dung va, luong va, dong va
tuan tap » toan tap, tuan tai, tuyen 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 ((dieu hanh) or (thien thanh)) - hanh truong cua tong ((duong van) OR (duong va)) tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (thien thanh)) - hanh truong cua tong ((duong van) OR (duong va)) tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((dieu hanh) or (thien thanh)) - hanh truong cua tong ((duong van) OR (duong va)) tuan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (thien thanh)) - hanh truong cua tong ((duong van) OR (duong va)) tuan tap*.