Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
than cua » nhan cua, ban cua, gian cua
thai cua » tai cuc, tri cua, dai cua
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 thieu sang - hanh ((than cua) or (thai cua)) nhung cong hach toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((than cua) OR (thai cua)) nhung cong hach toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((than cua) or (thai cua)) nhung cong hach toan cao*.