Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
thuc gia » thuc giai, thue gia, thuc dia
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
y nang » ky nang, ly nang, v nang
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang xa hoi. ((hieu va) or (lieu va)) cach thuc gia thanh ((vi cua) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. ((hieu va) OR (lieu va)) cach thuc gia thanh ((vi cua) OR (di cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. ((hieu va) or (lieu va)) cach thuc gia thanh ((vi cua) OR (di cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. ((hieu va) or (lieu va)) cach thuc gia thanh ((vi cua) OR (di cua)) tre*.