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
hieu ve » hieu va, hieu van
hai cua » thai cua, dai cua, hoi cua
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ve cam » ve cham, ve cac, va cam

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