Perhaps you should try some spelling variations:
"thoi phap cau." » "thi phap cau." (Expand Search), "thong phap cau." (Expand Search), "toi pham cau." (Expand Search), "thoi phap ca." (Expand Search), "thoi phap cac." (Expand Search), "thoi phap chu." (Expand Search)
"hoi nhap cau." » "hoi nhap cu." (Expand Search), "hoi nhap ca." (Expand Search), "hoi nhap cao." (Expand Search)
"hoi hat cau." » "hoi phat cau." (Expand Search), "hoi nhan cau." (Expand Search), "hoi hat chau." (Expand Search), "hoi hat ca." (Expand Search), "hoi vat cau." (Expand Search)
"hoi va cau." » "hoi va chau." (Expand Search), "hoi va cac." (Expand Search), "hoi va cao." (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"hoi hat cau.\") OR (((\"hoi nhap cau.\") OR (\"thoi phap cau.\"))))) OR (\"hoi va cau.\"))~".
• Removing quotes may allow a broader search: (((( hoi hat cau. ) OR ((( hoi nhap cau. ) OR ( thoi phap cau. ))))) OR ( hoi va cau. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("hoi hat cau.") OR ((("hoi nhap cau.") OR ("thoi phap cau."))))) OR ("hoi va cau."))*.