Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong doan » phuong loan, phuong hoang, huong dan
phuong dan » phuong danh, huong dan, phuong lan
hieu manh » chieu xanh, hieu nganh, dieu hanh
thien anh » thien danh, tien anh, thien thanh
trung ha » trung hoc, trung tam, trung cap
toan cau » toan cao, toan ban, toan tap
ha dung » hai dung, kha dung, nha dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (thien anh)) - thanh trung ha dung ((phuong dan) OR (phuong doan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (thien anh)) - thanh trung ha dung ((phuong dan) OR (phuong doan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (thien anh)) - thanh trung ha dung ((phuong dan) OR (phuong doan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien anh)) - thanh trung ha dung ((phuong dan) OR (phuong doan)) toan cau*.