Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trang » canh tranh, hanh trinh, minh trang
thong than » thong thanh, thong phan, thong thai
thong nhan » thong phan, thong quan, trong nha
hoc chieu » hoc thieu, ho chieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
tuan ban » tuan bang, toan ban, luan 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 - ((hanh trang) or (thanh trung)) cua thong ((thong than) OR (thong nhan)) tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - ((hanh trang) OR (thanh trung)) cua thong ((thong than) OR (thong nhan)) tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - ((hanh trang) or (thanh trung)) cua thong ((thong than) OR (thong nhan)) tuan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - ((hanh trang) or (thanh trung)) cua thong ((thong than) OR (thong nhan)) tuan ban*.