Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong san » cong tac
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban

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