Perhaps you should try some spelling variations:
phan xuong » phan cong
thuoc bach » thuoc sach, thuoc ban, truc bach
tri thuoc » tri thuc, tri hoc, tin thuoc
hoc bich » hoc lich, hoc dich, hoc tich
sach tri » sach tai, sach tren, sach truc
sach tin » sach tien, sach kinh, sach tren
te sach » toc sach
va phan » van phan, va phat, va phap
bach va » bach van, bach ha, sach va
su sach » so sach, vu sach
ha phan » hoa phan, hai phan, a phan
tin hoc » sinh hoc
ha pha » kham pha, hoa phan, khai pha

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 tin hoc bich ((ha phan) OR (ha pha)) tong ) or ( te sach tri thuoc bach va phan xuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tin hoc bich ((ha phan) OR (ha pha)) tong ) OR ( te sach tri thuoc bach va phan xuong )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach tin hoc bich ((ha phan) OR (ha pha)) tong ) or ( te sach tri thuoc bach va phan xuong ))".
• Adding a wildcard symbol may retrieve word variants: (( su sach tin hoc bich ((ha phan) OR (ha pha)) tong ) or ( te sach tri thuoc bach va phan xuong ))*.