Perhaps you should try some spelling variations:
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
danh va » doanh va, hanh va, anh va
ca tren » cau tren, cu tren, la tren
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va
x hoi » xa hoi, o hoi, x ho
va ca » va cac, va cao, va cai

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) or (su sach)) ky nang x hoi. hieu ve cam ((xuc va) OR (duc va)) danh va ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. hieu ve cam ((xuc va) OR (duc va)) danh va ca tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang x hoi. hieu ve cam ((xuc va) OR (duc va)) danh va ca tren*".