Perhaps you should try some spelling variations:
manh thanh » danh thanh, minh thanh, manh thang
thanh hai » thanh phan, thanh hoa, thanh san
duc manh » suc manh, duc anh, duc minh
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
lang xa » lang ha, dang xay, lang van
ve cac » va cac, vien cac
sac ky » sai ky
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (cac ky)) lang xa hoi. hieu ((ve cam) OR (ve cac)) duc manh thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac ky)) lang xa hoi. hieu ((ve cam) OR (ve cac)) duc manh thanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (cac ky)) lang xa hoi. hieu ((ve cam) OR (ve cac)) duc manh thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (cac ky)) lang xa hoi. hieu ((ve cam) OR (ve cac)) duc manh thanh hai cua tre*.