Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
tran xuan » tran quang, tran van
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than tu » thanh tu, thang tu, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu xanh - hanh ((trung tam) or (tran xuan)) thong cong tan than tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((trung tam) OR (tran xuan)) thong cong tan than tu*.