Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hanh ve » hanh vi, hanh va, hanh kem
va hanh » van hanh, va thanh, va danh
su viet » so viet
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
ve cam » ve cham, va cam, ve cai
ve su » va su

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

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