Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thanh lai » thanh hai, thanh lap, thanh loi
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
tu sach » su sach, te sach, tu cach
cua tre » cua te, cua triet, dua tren
thuc va » thuc vat, thuc dan, thuc day
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
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) OR (thu sach)) tu nang xa hoi. hieu ve 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) OR (thu sach)) tu nang xa hoi. hieu ve pham thuc va thanh lai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) tu nang xa hoi. hieu ve pham thuc va thanh lai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) tu nang xa hoi. hieu ve pham thuc va thanh lai ((cua tre) or (cuu tre))*.