Perhaps you should try some spelling variations:
van xuat » san xuat, va xuat, phan xuat
trinh vi » trinh va, trinh ve, trinh viet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
thi van » thi lan, thi hanh, thi nang
duoc va » nuoc va, duoc ma, duong va
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 x hoi. thi van xuat ((duoc va) OR (duc va)) trinh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. thi van xuat ((duoc va) OR (duc va)) trinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. thi van xuat ((duoc va) OR (duc va)) trinh vi cua tre*.