Perhaps you should try some spelling variations:
hanh va » hang va, hanh vi
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
te sach » toc sach
ca viet » va viet, co viet, hoa viet
nang xa » lang xa, nang ma, mang xa
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 y ((nang xa) or (nang x)) hoi. hieu vu cham ((tuc va) or (luc va)) hanh va ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang x)) hoi. hieu vu cham ((tuc va) OR (luc va)) hanh va ca viet.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang x)) hoi. hieu vu cham ((tuc va) or (luc va)) hanh va ca viet*.