Perhaps you should try some spelling variations:
quoc doanh » quoc danh, quoc khanh, quoc toan
phan thong » phan thuong, phan hong, phan tong
hoc thong » hoc thuong, hoc trong, hoc hong
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach tri » sach tai, sach tren, sach truc
sach tru » sach truc, sach thu, sach tu
tru quoc » thu quoc, trung quoc, tran quoc
hoa phan » hoa dan, co phan
tu sach » thu sach, su sach, te sach
tri hoc » triet hoc, tri thuc, thai hoc
hoc lao » hoc cao, hoc lam, hoc bao
lao hoa » lao khoa, bao hoa, lai hoa

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 tri hoc lao hoa hoc thong ) or ( tu sach tru quoc doanh hoa phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri hoc lao hoa hoc thong ) OR ( tu sach tru quoc doanh hoa phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri hoc lao hoa hoc thong ) or ( tu sach tru quoc doanh hoa phan thong ))*.