Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
quoc ban » quoc bao, quoc lan, quoc quan
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
xuc ban » duc ban, cuc ban, xuat ban
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa

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 ty nang ma hoi. lieu va cam ((xuc ban) OR (quoc ban)) thanh ve ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ma hoi. lieu va cam ((xuc ban) OR (quoc ban)) thanh ve ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ma hoi. lieu va cam ((xuc ban) OR (quoc ban)) thanh ve ((cua tre) or (cuu tre))*".