Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
cau tren » cu tren, dau tren, ca tren
so sach » so sanh, bo sach, co sach
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
vai cau » va cau, van cau, vai cac
ma hoi » mai hoi, xa hoi, ma hoa
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 (do sanh)) ty nang ma hoi. hieu van 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 (do sanh)) ty nang ma hoi. hieu van cam ((xuc va) OR (duc va)) hanh vai cau tren.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (do sanh)) ty nang ma hoi. hieu van cam ((xuc va) or (duc va)) hanh vai cau tren*.