Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
hieu ve » hieu va, hieu van
tai cuu » tai cuc, tai buu, tai cua
cam loc » cam lo
dau hoi » dai hoi, dan hoi, dau noi
sach ty » sach tu, sach thu, xach tay
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach y) or (sach ty)) nang ((dau hoi) or (cau hoi)). hieu ve cam loc va thanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach y) OR (sach ty)) nang ((dau hoi) OR (cau hoi)). hieu ve cam loc va thanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sach ty)) nang ((dau hoi) or (cau hoi)). hieu ve cam loc va thanh tai cuu tre*.