Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
tinh dinh » trinh dinh, tinh ninh, tinh binh
tran chap » tranh chap, tran chau, trang cham
cong tan » cong tac, cong san, cong thanh
dinh va » dinh van, dinh ve, tinh va

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 (chieu sang)) - tinh dinh va nhung cong tan tran chap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu sang)) - tinh dinh va nhung cong tan tran chap*.