Perhaps you should try some spelling variations:
thong nhung » trong nhung, thong thuong, thong thong
thieu sang » chieu sang, thieu khang, thieu quang
thien quan » trien quang, lien quan, thien van
thanh tung » thanh cong
nhung manh » hung manh, nhung thanh, nhung van
tung toan » dung toan, truong toan, quang toan
manh tuan » anh tuan, manh toan, minh tuan
tuan cau » toan cau, quan cau, tuan cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) or (thien quan)) - thanh tung toan thong nhung manh tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thien quan)) - thanh tung toan thong nhung manh tuan cau*.