Perhaps you should try some spelling variations:
sach thuc » cach thuc, sach thu, sach truc
sach thue » sach thu, sach thieu, sach tham
nhung cau » chung cu, nhung bai, nhu cau
phat xuc » chat xuc, phat xuat, phap xu
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc va
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach thuc) OR (sach thue)) nhung cau hoi. hieu va phat xuc va thanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach thuc) OR (sach thue)) nhung cau hoi. hieu va phat xuc va thanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach thuc) OR (sach thue)) nhung cau hoi. hieu va phat xuc va thanh vi cuu tre*.