Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
truong va » truong dai, truong cao, truong dao
trung va » trang va, trung ha, trung tam
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan 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 anh) or (hieu manh)) - thanh ((trung va) OR (truong va)) nhung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (hieu manh)) - thanh ((trung va) OR (truong va)) nhung cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) or (hieu manh)) - thanh ((trung va) OR (truong va)) nhung cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (hieu manh)) - thanh ((trung va) OR (truong va)) nhung cong tac toan tap*.