Perhaps you should try some spelling variations:
sach nhat » sach nha, sach phat, sach tham
sach phap » sach phat, sach nha, sach tham
goc nhan » ngoc nhan, goc nhin, hoc nhan
toc sach » hoc sach, doc sach, thuoc sach
phap thu » phap thuc, phap tu, phap che
su sach » so sach, vu sach
nhan su » nhan luc
nhan so » nhat so, nhan mo, nha so
so viet » hoc viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach nhat ngu - goc nhan su viet ) or ( toc sach phap thu - goc nhan so viet ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach nhat ngu - goc nhan su viet ) OR ( toc sach phap thu - goc nhan so viet )).
• Adding a wildcard symbol may retrieve word variants: (( su sach nhat ngu - goc nhan su viet ) or ( toc sach phap thu - goc nhan so viet ))*.