Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thanh hoa » thanh pho
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
thanh do » thanh de, thanh pho, thanh loi
tu sach » su sach, te sach, tu cach
thuc va » thuc vat, thuc dan, thuc day
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
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) or (thu sach)) y nang xa hoi. hieu van pham thuc va ((thanh do) or (thanh hoa)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang xa hoi. hieu van pham thuc va ((thanh do) OR (thanh hoa)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang xa hoi. hieu van pham thuc va ((thanh do) or (thanh hoa)) cua tre*.