Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung qua » trung quan, trong qua, trung cua
dung cong » dung trong
tran tuan » tran xuan, tran quang, tran thanh
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, trang tai

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) or (hieu manh)) - thanh trung qua dung cong tan ((tran tap) OR (tran tuan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh trung qua dung cong tan ((tran tap) OR (tran tuan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - thanh trung qua dung cong tan ((tran tap) OR (tran tuan))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - thanh trung qua dung cong tan ((tran tap) OR (tran tuan))*.