Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hanh » hanh han, xanh hanh, nhanh thanh
luu hanh » huu han
hieu van » hieu va, thien van, lieu va
hai luu » hat luu, hoi luu, hai luom
cua tre » cua te, cuu tre, dua tren
hanh ve » hanh vi, hanh va, hanh kem
te sach » toc sach
nang xa » lang xa, nang ma, mang xa
van hai » van ha, van chat, van hanh

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 xa) or (nang x)) hoi. hieu van hai luu hanh hanh ve ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang x)) hoi. hieu van hai luu hanh hanh ve ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang x)) hoi. hieu van hai luu hanh hanh ve ((cua tre) or (cua triet))*.