Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh dai » hanh tai, hanh dao, vanh dai
tan hanh » tan thanh, tang hanh, toan hanh
pham duy » pham duc
phan duc » pham duc, phan tu, phan dau
sach thu » sach thue, sach thieu, sach tham
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
dai va » mai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach y) or (sach thu)) nang xa hoi. hieu ve ((phan duc) or (pham duy)) tan hanh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach thu)) nang xa hoi. hieu ve ((phan duc) OR (pham duy)) tan hanh dai va triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach thu)) nang xa hoi. hieu ve ((phan duc) or (pham duy)) tan hanh dai va triet*.