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

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 van ((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 van ((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 van ((nam thuc) or (nam thu)) va ((thanh hoa) or (hanh lam)) cua tre*.