Perhaps you should try some spelling variations:
trinh thanh » tinh thanh, trinh han, trinh toan
hanh trinh » canh tranh, hanh chinh
thieu xanh » chieu xanh, hieu manh, thien danh
quang dang » quang dung, quang hoang, quang khang
quang dong » quang dung, quan dong, quang cuong
thien anh » thien danh, tien anh, thien thanh
thanh cac » hanh cac, thanh bac, thanh ca

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) or (thien anh)) - hanh trinh ((quang dang) OR (quang dong)) cong trinh thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - hanh trinh ((quang dang) OR (quang dong)) cong trinh thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - hanh trinh ((quang dang) OR (quang dong)) cong trinh thanh cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh trinh ((quang dang) OR (quang dong)) cong trinh thanh cac*.