Perhaps you should try some spelling variations:
khoan phai » khong phai, khoa phau, khoan hoi
phai phong » hai phong, phap phong, thai phong
nuoc khoan » nuoc khoa, nuoi khoa, coc khoan
sach tham » sach nha
sach thu » sach thue, sach thieu, cach thuc
tuc nuoc » tu nuoc, duoc nuoc, tuc truoc
te sach » toc sach
tham tu » pham tu, tam tu, tham du
tu sach » thu sach, su sach, tu cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach tham tu cac khoan phai phong ) or ( tu sach thu tuc nuoc khoan phai phong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tham tu cac khoan phai phong ) OR ( tu sach thu tuc nuoc khoan phai phong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tham tu cac khoan phai phong ) or ( tu sach thu tuc nuoc khoan phai phong ))*.