Perhaps you should try some spelling variations:
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
ve cam » ve cac, va cam, ve cai
luc va » duc va, tuc va, loc va
vi su » va su, ve su, ki su
kien » bien, vien, tien

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) or (sach y)) lang xa hoi. hieu ((ve cam) or (ve cham)) luc va hanh vi su kien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) lang xa hoi. hieu ((ve cam) OR (ve cham)) luc va hanh vi su kien.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) lang xa hoi. hieu ((ve cam) or (ve cham)) luc va hanh vi su kien*.