Perhaps you should try some spelling variations:
manh thang » danh thang, minh thang, nhanh thang
manh thanh » danh thanh, minh thanh, anh thanh
toan cuu » toan cau, toan cua, toan cao
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac

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

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