Perhaps you should try some spelling variations:
thuat va » thuyet va, thuat xay, thuat bai
thao duc » thao duoc, tho duc, than duc
hang xa » hoang xa, hang va, lang xa
hang ca » hang va, nang cao, hang tai
hieu va » lieu va, hieu qua
va thao » van thao, va khao, va tham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
va ty » van ty, va ky, va tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat va ty ((hang xa) or (hang ca)) hoi. hieu va thao duc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat va ty ((hang xa) OR (hang ca)) hoi. hieu va thao duc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat va ty ((hang xa) or (hang ca)) hoi. hieu va thao duc va hanh vi cua tre*.