Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
lam loc » lam duoc, lam ngoc
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
y nang » ky nang, ly nang, v nang
va lam » van lam, va lap
du dau » tu dau, dung dau
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: tu sach y nang x hoi. hieu va lam loc ((va danh) OR (va dinh)) du dau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu va lam loc ((va danh) OR (va dinh)) du dau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu va lam loc ((va danh) OR (va dinh)) du dau tren*.