Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
sach lo » sach dao, sach doi, sach hoi
hang vi » hang va, hanh vi, hang di
hanh di » hanh vi, hanh de, hang di
vu sach » vu bach, su sach, vu khach
van lam » van nam
nang xa » nang x, lang xa, nang ma
lo nang » ho nang, ly nang, loai nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach lo nang xa hoi. hieu van lam ((duc va) or (thuc vat)) ((hanh di) or (hang vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach lo nang xa hoi. hieu van lam ((duc va) OR (thuc vat)) ((hanh di) OR (hang vi)) cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach lo nang xa hoi. hieu van lam ((duc va) or (thuc vat)) ((hanh di) or (hang vi)) cua triet*.