Perhaps you should try some spelling variations:
khung huong » nhung huong, nhung phuong, hung vuong
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
huong tinh » khuong tinh, thuong tinh, duong tinh
trong dai » trong doi, trong dam, trong hai
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 xanh) or (chieu sang)) - anh ((trong dai) OR (truong dai)) khung huong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - anh ((trong dai) OR (truong dai)) khung huong tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sang)) - anh ((trong dai) OR (truong dai)) khung huong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - anh ((trong dai) OR (truong dai)) khung huong tinh toan cau*.