Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
vu cham » va cham, vu kham, tu cham
hanh vu » hanh vi, hanh va, hanh tu
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, ve chim
lang xa » lang ha, dang xay, lang van
y lang » o lang, _ lang, tay lang
ve cai » va cai, ve cac, ve tai
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: tu sach y lang xa hoi. hieu ((ve cai) or (((ve cham) or (vu cham)))) tuc va hanh vu va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu ((ve cai) OR (((ve cham) OR (vu cham)))) tuc va hanh vu va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ((ve cai) or (((ve cham) or (vu cham)))) tuc va hanh vu va thiet*.