Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh tai » thanh hai, thanh toan, doanh tai
thanh vai » thanh hai, thanh van, thanh oai
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va cao » va cac, va dao, va bao
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang xa hoi. hieu ((va cao) or (va co)) duc va ((thanh vai) OR (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. hieu ((va cao) OR (va co)) duc va ((thanh vai) OR (thanh tai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang xa hoi. hieu ((va cao) or (va co)) duc va ((thanh vai) OR (thanh tai)) cua tre*".