Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
hung luong » hung vuong, dung luong, hang luong
luong manh » duong manh, luong thanh, duong minh
hieu lang » chieu sang, nhieu tang, hieu van
trung dap » trung cap, trung dai, trung dam
manh toan » thanh toan, anh tuan, tinh toan
dap hung » dap nhung, dap ung, dac hung
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 (hieu quang)) - thanh trung dap hung luong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (hieu quang)) - thanh trung dap hung luong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (hieu quang)) - thanh trung dap hung luong manh toan cau*.