Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu cach » hieu cac, chieu sach, hieu ca
trung va » truong va, trang va, trung ha
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (((chieu sang) or (hieu cach)))) - hanh trung va nhung cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (((chieu sang) OR (hieu cach)))) - hanh trung va nhung cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (((chieu sang) or (hieu cach)))) - hanh trung va nhung cong tan tran cau*.