Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong san » cong tac
toan cao » toan tap
toan ban » van ban
tung he » dung he, tung ho, tang he

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chieu tinh)) - thanh tung he thong cong san ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu tinh)) - thanh tung he thong cong san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu tinh)) - thanh tung he thong cong san ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu tinh)) - thanh tung he thong cong san ((toan cao) OR (toan ban))*.