Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
ve cham » va cham, ve chat, ve chim
sach ky » sac ky, sach y, sach ty
vu cham » va cham, vu kham, tu cham
lang xa » lang ha, dang xay, lang van
luc van » luoc van, luu van, duc van
ky lang » ky nang, ky dang, ky tang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky lang xa hoi. hieu ((((ve cham) or (vu cham))) or (vien cac)) luc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky lang xa hoi. hieu ((((ve cham) OR (vu cham))) OR (vien cac)) luc van hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky lang xa hoi. hieu ((((ve cham) or (vu cham))) or (vien cac)) luc van hanh vi cua viet*.