Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
van thanh » ban thanh, van tuan
ki thuat » ky thuat
vien cua » viec cua, dien cua, tien cua
ve thuat » va thuat, ky thuat, my thuat
so sach » so sanh, bo sach, co sach
duc van » duc va, duc tan, duc manh
sach ky » sac ky, sach y, sach ty
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky dang ha hoi. hieu ((ve thuat) OR (ki thuat)) duc van thanh vien cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang ha hoi. hieu ((ve thuat) OR (ki thuat)) duc van thanh vien cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang ha hoi. hieu ((ve thuat) OR (ki thuat)) duc van thanh vien cua tre*.