Perhaps you should try some spelling variations:
thanh trinh » thanh tinh, thanh binh, thanh trung
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
toan cao » toan ban, toan tap
va dung » van dung, va duong, vat dung

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 trinh) or (hanh trinh)) va dung cong hach toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((thanh trinh) OR (hanh trinh)) va dung cong hach toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((thanh trinh) or (hanh trinh)) va dung cong hach toan cao*.