Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
y lang » o lang, _ lang, tay lang
ve cam » ve cham, ve cac, va cam
thiet » thieu

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

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