Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau thuc » cau truc, cuu thuc, can thuc
te sach » toc sach
nang xa » nang x, lang xa, nang ma
qua cau » quan cau, qua cac, qua ca
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
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: ((thu sach) or (te sach)) ky nang xa hoi. hieu qua cau thuc va dinh ((vi cua) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky nang xa hoi. hieu qua cau thuc va dinh ((vi cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) ky nang xa hoi. hieu qua cau thuc va dinh ((vi cua) OR (di cua)) tre*".