Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
sach thi » sach thu, sach tai, sach thieu
thi hang » thi hanh, thi nang, thi hong
cham tuc » nham thuc, tham thuc, cham soc
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
xa hanh » xa thanh, xa khanh, va hanh
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
va hoi » xa hoi, va hoc, va hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thi hang va hoi. hieu va ((cham tuc) OR (pham thuc)) xa hanh tai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thi hang va hoi. hieu va ((cham tuc) OR (pham thuc)) xa hanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sach thi hang va hoi. hieu va ((cham tuc) OR (pham thuc)) xa hanh tai cuu tre*.