Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
nam truc » nam truoc, nam thuc, nam trung
te sach » toc sach
nam tuc » nam thuc, nam tu, nam thuoc
doi cuu » doi cua, doi cuoc
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu van
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. ((hieu ve) or (hieu va)) ((nam tuc) OR (nam truc)) va hanh doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. ((hieu ve) OR (hieu va)) ((nam tuc) OR (nam truc)) va hanh doi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. ((hieu ve) or (hieu va)) ((nam tuc) OR (nam truc)) va hanh doi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. ((hieu ve) or (hieu va)) ((nam tuc) OR (nam truc)) va hanh doi cuu tre*.