Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trang tuan » tran tuan, trung tuan, tran xuan
trong tuan » trong quan, trung tuan, trong tan
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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