Perhaps you should try some spelling variations:
dinh toai » dinh toi, tinh toan, dinh tri
nam thuc » nam thuoc, am thuc, nam thu
dinh tai » dinh tri, dinh thi, hinh tai
tu sach » thu sach, su sach, tu cach
thuc va » thuc vat, thuc dan, thuc day
duc tre » duoc tren, duc tien
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
te sach » toc sach
y nang » ky nang, ly nang, v nang
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) y nang xa hoi. hieu ve nam thuc va ((dinh tai) OR (dinh toai)) duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang xa hoi. hieu ve nam thuc va ((dinh tai) OR (dinh toai)) duc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y nang xa hoi. hieu ve nam thuc va ((dinh tai) OR (dinh toai)) duc tre*".