Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
cam nhung » cam hung, nam nhung, tham nhung
ve nhung » va nhung, tu nhung
anh toan » manh toan, anh tuan, thanh toan
dan than » dan chan, ban than, van than

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trinh ((ve nhung) OR (cam nhung)) cong ((anh toan) OR (dan than)) tap~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh ((ve nhung) or (cam nhung)) cong ((anh toan) or (dan than)) tap*.