Perhaps you should try some spelling variations:
thanh hoa » thanh pho
nam thuc » nam thuoc, am thuc, nam tu
hanh lam » thanh lap, hanh kem, hanh va
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 ty nang xa hoi. hieu ve ((nam thuc) OR (nam thu)) va ((thanh hoa) or (hanh lam)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ve ((nam thuc) OR (nam thu)) va ((thanh hoa) OR (hanh lam)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ve ((nam thuc) OR (nam thu)) va ((thanh hoa) or (hanh lam)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ve ((nam thuc) OR (nam thu)) va ((thanh hoa) or (hanh lam)) cua tre*.