Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thanh lai » thanh hai, thanh lap, thanh loi
van pham » san pham, van phan, van phat
tru nang » tra nang, tri nang, truc nano
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cua triet, dua tren
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
tu nang » tu nong, tu nano, tu lang
cuu tre » cau tren, cau treo

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 ((tu nang) or (tru nang)) xa hoi. hieu van pham thuc va thanh lai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu nang) OR (tru nang)) xa hoi. hieu van pham thuc va thanh lai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu nang) or (tru nang)) xa hoi. hieu van pham thuc va thanh lai ((cua tre) or (cuu tre))*.