Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, hieu lang, nhiet nang
hieu quang » thieu quang, hieu quan, hieu qua
luong manh » duong manh, luong thanh, duong minh
cap nhung » cam nhung, vap nhung, canh nhung
dap nhung » vap nhung, va nhung, dap ung
manh toan » thanh toan, anh tuan, tinh toan
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 ((nhieu tang) or (hieu quang)) - thanh trung ((cap nhung) OR (dap nhung)) luong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (hieu quang)) - thanh trung ((cap nhung) OR (dap nhung)) luong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhieu tang) or (hieu quang)) - thanh trung ((cap nhung) OR (dap nhung)) luong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (hieu quang)) - thanh trung ((cap nhung) OR (dap nhung)) luong manh toan cau*.