Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
tinh lap » trinh lap, tinh lao, dinh lap
sach ty » sach y, sach tu, sach thu
va tinh » may tinh
tu sach » thu sach, su sach, te sach
xang xa » lang xa, mang xa, ang xa
ve cham » va cham, ve chat, vu cham
ve cac » va cac, vien cac
ve cam » va cam, ve cai, ve cau
tuc va » thuc va, truc va, tuc xa
lap va » tap va

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 ty xang xa hoi. hieu ((((ve cam) or (ve cham))) or (ve cac)) tuc va tinh lap va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang xa hoi. hieu ((((ve cam) OR (ve cham))) OR (ve cac)) tuc va tinh lap va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang xa hoi. hieu ((((ve cam) or (ve cham))) or (ve cac)) tuc va tinh lap va triet*.