Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh vai » hanh vi, hanh va, hanh tai
so sanh » do sanh
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
vai cau » va cau, van cau, vai cac
so sach » bo sach, co sach, hoc sach
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (so sanh)) ty nang ma hoi. hieu ve cam ((xuc va) or (duc va)) hanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty nang ma hoi. hieu ve cam ((xuc va) OR (duc va)) hanh vai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ty nang ma hoi. hieu ve cam ((xuc va) or (duc va)) hanh vai cau tren".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) ty nang ma hoi. hieu ve cam ((xuc va) or (duc va)) hanh vai cau tren*.