Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van chat » cao chat
dang xay » dang van, van xay
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
te sach » toc sach
van hai » van ha, van hanh, van phan
cuc va » chuc va, duc va, cuu va
va ve » va de, va le, va vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang cao) or (dang xay)) hoi. hieu ((van hai) or (van chat)) cuc va hanh va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang cao) OR (dang xay)) hoi. hieu ((van hai) OR (van chat)) cuc va hanh va ve triet.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang cao) or (dang xay)) hoi. hieu ((van hai) or (van chat)) cuc va hanh va ve triet*.