Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
sach ky » sach y, sach ty, sach kem
cua tre » cua te, cua triet, dua tren
duc gia » quoc gia
cac duc » cac du, cao duc, cac dac
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
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: su ((sach ky) or (sac ky)) lang xa hoi. hieu ve cac duc gia thanh vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) lang xa hoi. hieu ve cac duc gia thanh vai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) lang xa hoi. hieu ve cac duc gia thanh vai ((cua tre) OR (cuu tre))*".