Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
dinh thi » dinh tri
danh tai » doanh tai, dinh tai, hanh tai
tu sach » thu sach, su sach, te sach
cuc tre » duc tre, cua tre, cuu tre
cam tuc » cam xuc, cam tu, dam thuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) va ((danh tai) or (dinh thi)) cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) va ((danh tai) OR (dinh thi)) cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) va ((danh tai) or (dinh thi)) cuc tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) va ((danh tai) or (dinh thi)) cuc tre*.