Perhaps you should try some spelling variations:
tuong luong » thuong luong, tuong duong, trong luong
trang tuong » trang vuong, trong tuong, tran tuong
hanh trang » thanh trung, canh tranh, hanh trinh
chieu sang » chieu sach, chieu xanh, nhieu tang
luong cong » dung cong, trong cong, cong cong
hieu lang » hieu quang, nhieu tang, hieu van
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan 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 ((hieu lang) or (chieu sang)) - hanh trang tuong luong cong dan ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (chieu sang)) - hanh trang tuong luong cong dan ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu lang) or (chieu sang)) - hanh trang tuong luong cong dan ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (chieu sang)) - hanh trang tuong luong cong dan ((toan cau) OR (toan tap))*.