Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, pham thuc
nham thu » nam thu, pham thu, nhan thuc
vat hanh » vat thanh, van hanh, va hanh
hanh van » thanh van, khanh van, hanh va
cau tren » cu tren, dau tren, ca tren
co sach » bo sach, cuon sach, hoc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
van cau » van dau, van hau, van chat
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: co sach ky nang x hoi. hieu va ((nham thuc) OR (nham thu)) vat hanh van cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ky nang x hoi. hieu va ((nham thuc) OR (nham thu)) vat hanh van cau tren".
• Adding a wildcard symbol may retrieve word variants: co sach ky nang x hoi. hieu va ((nham thuc) OR (nham thu)) vat hanh van cau tren*.