Perhaps you should try some spelling variations:
thong thuong » thong thong, hang thuong, cong thuong
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh huong » thanh huong, anh huong, manh huong
thuong dan » huong dan, thuong han, thuong dam
huong cua » dung cua
cua thong » cua thuong, cua khong, cua tong
than cao » thai cao, than cap, than sao
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 xanh) or (trieu tinh)) - hanh huong cua thong thuong dan ((than cao) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (trieu tinh)) - hanh huong cua thong thuong dan ((than cao) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (trieu tinh)) - hanh huong cua thong thuong dan ((than cao) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (trieu tinh)) - hanh huong cua thong thuong dan ((than cao) OR (toan cao))*.