Perhaps you should try some spelling variations:
hoc viet » hoc hien
van dinh » van minh, van dich, va dinh
sach ky » sac ky, sach y, sach ty
va tinh » may tinh
va danh » va dinh, va dan, va hanh
so sach » so sanh, bo sach, co sach
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cam » ve cham, ve cac, va cam
vi hoc » li hoc, va hoc

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 lang xa hoi. hieu ve cam tuc ((va danh) or (((va tinh) or (van dinh)))) vi hoc viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang xa hoi. hieu ve cam tuc ((va danh) OR (((va tinh) OR (van dinh)))) vi hoc viet.
• Adding a wildcard symbol may retrieve word variants: so sach ky lang xa hoi. hieu ve cam tuc ((va danh) or (((va tinh) or (van dinh)))) vi hoc viet*.