Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
nam thuc » nam thuoc, am thuc, nam thu
va thanh » gia thanh, ban thanh, va tinh
sach thu » sach thue, sach thieu, sach tham
bang cau » hang cau, bang cac, nang cao
cuc tre » duc tre, cua tre, cuu tre
cam tuc » cam xuc, cam tu, dam thuc
sach ty » sach y, sach tu, xach tay
hieu ve » hieu va, hieu van

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 ty) OR (sach thu)) bang cau hoi. hieu ve ((cam tuc) or (nam thuc)) va thanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) bang cau hoi. hieu ve ((cam tuc) OR (nam thuc)) va thanh tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach thu)) bang cau hoi. hieu ve ((cam tuc) or (nam thuc)) va thanh tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach thu)) bang cau hoi. hieu ve ((cam tuc) or (nam thuc)) va thanh tai cuc tre*.