Perhaps you should try some spelling variations:
cua truong » xuan truong, cac truong, xa truong
nhieu tang » chieu sang, nhiet nang
dong thanh » truong thanh
thanh toan » thanh hoa, thanh san, tinh toan
hieu lang » chieu sang, hieu quang, hieu van
canh manh » lanh manh, canh tranh, cach mang
cua trung » xuan trung, cua nhung, ba trung
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 ((hieu lang) OR (nhieu tang)) - canh manh ((cua truong) or (cua trung)) dong thanh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (nhieu tang)) - canh manh ((cua truong) OR (cua trung)) dong thanh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu lang) OR (nhieu tang)) - canh manh ((cua truong) or (cua trung)) dong thanh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) OR (nhieu tang)) - canh manh ((cua truong) or (cua trung)) dong thanh toan cau*.