Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trinh » canh tranh, hanh chinh
chi xanh » chi anh, chi danh, chi hanh
vat cong » sat cong, vat con, vat dong
bat cong » bat dong, ban cong, ba cong
tac phan » tac pham, tai phan, tac phat
phan cau » phan dau, phan cac, phan tu
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - ((hanh trinh) or (thanh trung)) cua ((vat cong) OR (bat cong)) tac phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((hanh trinh) OR (thanh trung)) cua ((vat cong) OR (bat cong)) tac phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - ((hanh trinh) or (thanh trung)) cua ((vat cong) OR (bat cong)) tac phan cau".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((hanh trinh) or (thanh trung)) cua ((vat cong) OR (bat cong)) tac phan cau*.