Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
cong thanh » dong thanh, cong trinh, truong thanh
hoc thieu » toc thieu, hoc hien
trung cao » truong cao, trung cap, trung co
cao dung » cao dang, cao dong, cao ung
cong tan » cong tac, cong ty, cong ha
cong san » cong tac
toan cau » toan cao, toan ban, toan 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 thieu xanh - thanh trung cao dung ((cong thanh) or (((cong tan) OR (cong san)))) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh trung cao dung ((cong thanh) OR (((cong tan) OR (cong san)))) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh trung cao dung ((cong thanh) or (((cong tan) OR (cong san)))) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh trung cao dung ((cong thanh) or (((cong tan) OR (cong san)))) toan cau*.