Perhaps you should try some spelling variations:
thanh vi » thanh va, thanh ve, nhanh vi
su sach » so sach, vu sach
cau tuc » cau truc, cau tu, cau luc
tuc van » thuc van, truc van, tuc va
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
co hoa » co hoat, cho hoa, co hoc
va cau » van cau, va cac, va dau
o hoa » do hoa, so hoa, o ha

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