Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
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
cao dong » cao dang, lao dong, dao dong
cao cong » cac cong, cao dang, cua cong
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 truong ((cao dong) OR (cao cong)) cong hach toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh truong ((cao dong) OR (cao cong)) cong hach toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh truong ((cao dong) OR (cao cong)) cong hach toan cao*.