Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
va lam » van lam, va lap
loc va » luc va
di cuu » di cau, di cua, dinh cuu

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 ma hoi. hieu va lam ((loc va) or (hoc va)) hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu va lam ((loc va) OR (hoc va)) hanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu va lam ((loc va) or (hoc va)) hanh di cuu tre*.