Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
hanh vu » hanh vi, hanh va, hanh tu
ve cam » ve cac, va cam, ve cai
tuc va » thuc va, truc va, tuc xa
vu va » vu van, tu va, su va
thiet » thieu

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