Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhanh lang » nhanh quang, nhanh thang, nhan dang
hoc thieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
cua van » cua ban, cua vat, cua can
cua dan » cua dang, cua ban, ca dan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - nhanh lang ((cua van) OR (cua dan)) cong tan ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - nhanh lang ((cua van) OR (cua dan)) cong tan ((toan cau) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - nhanh lang ((cua van) OR (cua dan)) cong tan ((toan cau) or (toan tap))*.