Perhaps you should try some spelling variations:
te sach » toc sach
hanh va » hang va, hanh vi
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ca viet » va viet, co viet, hoa viet
nang xa » lang xa, nang ma, mang xa
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
luc va » duc va, loc va
va ca » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang xa) or (nang x)) hoi. hieu ve cam ((tuc va) or (luc va)) hanh va ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang x)) hoi. hieu ve cam ((tuc va) OR (luc va)) hanh va ca viet.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (nang x)) hoi. hieu ve cam ((tuc va) or (luc va)) hanh va ca viet*.