Perhaps you should try some spelling variations:
"ho thi hinh thai" » "ho thi sinh thai", "ho thi tinh thai", "ho thi dinh thi", "ho thi hanh thai", "ho thi thanh thai", "ho thi bich thai", "hoi thi hinh thai", "hoa thi hinh thai", "ha thi hinh thai"
"do thi minh tai" » "do chi minh tai", "do thi hanh tai", "do thi bich tai", "do thi hinh tai", "do thi minh tri", "do thi dinh tai"
"ho chi hinh bai" » "ho chi minh bai", "ho chi binh bai", "ho chi dinh bai", "ho chi hinh tai", "ho chi tinh bac", "ho chi dinh ba"
"ho chi anh bai" » "ho chi danh bai", "ho chi hanh bai", "ho thi anh bai", "ho chi sach bai", "ho chi danh bat"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("ho thi hinh thai") or ("do thi minh tai"))) or ((("ho chi hinh bai") OR ("ho chi anh bai"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ho thi hinh thai") OR ("do thi minh tai"))) OR ((("ho chi hinh bai") OR ("ho chi anh bai")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ho thi hinh thai\") or (\"do thi minh tai\"))) or (((\"ho chi hinh bai\") OR (\"ho chi anh bai\"))))".
• Removing quotes may allow a broader search: (((( ho thi hinh thai ) or ( do thi minh tai ))) or ((( ho chi hinh bai ) OR ( ho chi anh bai )))).
• Adding a wildcard symbol may retrieve word variants: (((("ho thi hinh thai") or ("do thi minh tai"))) or ((("ho chi hinh bai") OR ("ho chi anh bai"))))*.