Perhaps you should try some spelling variations:
trong nhung » thong nhung, trong hung, trong phung
thieu sang » chieu sang, thieu khang, thieu quang
thien quan » trien quang, lien quan, thien van
thanh tung » thanh cong
toan trong » toan thong, tran trong, gian trong
nhung hanh » nhung thanh, nhung manh, nhung danh
tung toan » dung toan, truong toan, quang toan
hanh tuan » thanh tuan, anh tuan, manh 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 trong nhung hanh tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thien quan)) - thanh tung toan trong nhung hanh tuan cau*.