Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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 sang) OR (hieu lang))) or (chieu tinh)) - hanh trung cua nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu sang) OR (hieu lang))) OR (chieu tinh)) - hanh trung cua nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((chieu sang) OR (hieu lang))) or (chieu tinh)) - hanh trung cua nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sang) OR (hieu lang))) or (chieu tinh)) - hanh trung cua nhung cong tac toan cau*.