Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thue gia » phu gia
vai cua » dai cua, hai cua, lai cua
sach ly » sach y, sach lo, sach hay
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach ly) OR (sach ty)) nang xa hoi. hieu ((va cach) or (va cac)) thue gia thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ly) OR (sach ty)) nang xa hoi. hieu ((va cach) OR (va cac)) thue gia thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ly) OR (sach ty)) nang xa hoi. hieu ((va cach) or (va cac)) thue gia thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach ly) OR (sach ty)) nang xa hoi. hieu ((va cach) or (va cac)) thue gia thanh vai cua tre*.