Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
hanh tai » thanh tai, hang tai, han tai
hanh dai » hanh dao, vanh dai, thanh dat
cac ban » cac dan, cac van, can ban
cao hoi » cau hoi, co hoi, cao hoc
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky nang cao hoi. hieu ((va cao) or (ve cac)) cac ban ((hanh dai) or (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky nang cao hoi. hieu ((va cao) OR (ve cac)) cac ban ((hanh dai) OR (hanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang cao hoi. hieu ((va cao) or (ve cac)) cac ban ((hanh dai) or (hanh tai)) cua tre*.