Perhaps you should try some spelling variations:
sach nhat » sach nha, sach tham, sach dat
sach phat » sach nha, sach tham, cach pha
phat ngu » phap ngu, pham ngu, thuat ngu
hoc nhan » hoc nhanh, nhoc nhan, hoc phan
su sach » so sach, vu sach
nhan su » nhan luc
nhin so » khien so, nhin moi
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 phat ngu - hoc nhan su viet ) or ( su sach nhat ngu - goc nhin so viet ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach phat ngu - hoc nhan su viet ) OR ( su sach nhat ngu - goc nhin so viet )).
• Adding a wildcard symbol may retrieve word variants: (( su sach phat ngu - hoc nhan su viet ) or ( su sach nhat ngu - goc nhin so viet ))*.