Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van cau
vai dau » va dau, van dau, xvii dau
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu van cam ((xuc va) OR (tuc va)) hanh vai dau tieng~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang x hoi. hieu van cam ((xuc va) OR (tuc va)) hanh vai dau tieng".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang x hoi. hieu van cam ((xuc va) OR (tuc va)) hanh vai dau tieng*.