Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ro » nang co, nang ho, nang ra
luu tre » luu tru, cuu tre, luy tre
nang o » nang co, nang ho, nang x
va cau » van cau, va cac, va dau
tuc va » thuc va, truc va, duc va
ve luu » ke luu, vi luu

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 ky ((nang o) OR (nang ro)) hoc. lieu va cau ((tuc va) or (tuc xa)) thanh ve luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang o) OR (nang ro)) hoc. lieu va cau ((tuc va) OR (tuc xa)) thanh ve luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang o) OR (nang ro)) hoc. lieu va cau ((tuc va) or (tuc xa)) thanh ve luu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang o) OR (nang ro)) hoc. lieu va cau ((tuc va) or (tuc xa)) thanh ve luu tre*.