Perhaps you should try some spelling variations:
truong luan » truong quan, truong luat, truong quang
thieu sang » chieu sang, thieu khang, thieu quang
trung luan » trung tuan, trung quan, truong luat
hoc thieu » toc thieu, hoc hien
hung cong » nhung cong, hung cuong, phung cong
hach toan » thanh toan, manh toan
tac toan » tap toan, tam toan, tich toan

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 - thanh ((trung luan) or (truong luan)) hung cong ((tac toan) or (hach toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((trung luan) OR (truong luan)) hung cong ((tac toan) OR (hach toan)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((trung luan) or (truong luan)) hung cong ((tac toan) or (hach toan)) ban*.