Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh van » doanh van, dang van, dinh van
su sach » so sach, vu sach
hieu ve » hieu va
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
cam tu » cam thu, nam tu, dam tu
hoa » khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (v nang)) xa hoi. ((hieu ve) or (hieu van)) cam tu va danh van hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) xa hoi. ((hieu ve) OR (hieu van)) cam tu va danh van hoa viet.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) xa hoi. ((hieu ve) or (hieu van)) cam tu va danh van hoa viet*.