Perhaps you should try some spelling variations:
sach kem » hanh kem
hieu van » hieu va, thien van, lieu va
phan tai » pham tai, nhan tai, phan thi
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu duc
va phan » van phan, va phat, va phap
tai cua » thai cua, tai cuc, tri cua
cua tu » cua tuc, cua su, cua cu

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 kem) or (sach y)) nang xa hoi. hieu van cau duc va phan tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sach y)) nang xa hoi. hieu van cau duc va phan tai cua tu.
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sach y)) nang xa hoi. hieu van cau duc va phan tai cua tu*.