Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
dan thuc » dan toc, am thuc
hoc sach » hoc sinh, hoc cac, hoc anh
dau thuc » dai thuc, dam thuc, day thuc
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
v nang » va nang, vu nang, van nang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) v nang xa hoi. hieu va ((dau thuc) OR (dan thuc)) va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) v nang xa hoi. hieu va ((dau thuc) OR (dan thuc)) va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) v nang xa hoi. hieu va ((dau thuc) OR (dan thuc)) va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) v nang xa hoi. hieu va ((dau thuc) OR (dan thuc)) va danh vi cua te*.