Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
hanh phan » thanh phan, anh phan, hanh nhan
hanh han » hanh nhan, hanh san, anh han
va thong » va thuong, va phuong, he thong
cong tan » cong tac, cong san, cong thanh
nhan tai » hang tai, van tai, toan tai

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 han) or (hanh phan)) va thong ((huong dan) or (cong tan)) nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh han) OR (hanh phan)) va thong ((huong dan) OR (cong tan)) nhan tai.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh han) or (hanh phan)) va thong ((huong dan) or (cong tan)) nhan tai*.