Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh van
vu sach » vu bach, vu khach
su sach » so sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
v lang » va lang, o lang, _ lang
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (su sach)) v lang xa hoi. hieu ve cam tu va ((hanh vai) OR (hanh vi)) hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) v lang xa hoi. hieu ve cam tu va ((hanh vai) OR (hanh vi)) hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (su sach)) v lang xa hoi. hieu ve cam tu va ((hanh vai) OR (hanh vi)) hoa viet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) v lang xa hoi. hieu ve cam tu va ((hanh vai) OR (hanh vi)) hoa viet*.