Perhaps you should try some spelling variations:
nam truoc » nam thuoc, lam truoc, nam truc
truoc xay » thuc xay, truoc dam, truoc nam
hieu van » hieu va, thien van, hieu ve
xay hanh » day nhanh, day thanh, xanh hanh
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, me hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((ma hoi) or (ma hoa)). ((hieu van) OR (lieu va)) nam truoc xay hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((ma hoi) OR (ma hoa)). ((hieu van) OR (lieu va)) nam truoc xay hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) or (ma hoa)). ((hieu van) OR (lieu va)) nam truoc xay hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) or (ma hoa)). ((hieu van) OR (lieu va)) nam truoc xay hanh vai cuu tre*.