Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
cua tre » cua te, cuu tre, dua tren
luc ban » duc ban, cuc ban, luc bat
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
nang ma » tang ma, sang ma, nang cao
ve cam » ve cac, va cam, ve cai
ma hoi » mai hoi, xa hoi, ma hoa

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 thu nang ma hoi. hieu ((ve cam) or (ve cham)) luc ban thanh dai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu nang ma hoi. hieu ((ve cam) OR (ve cham)) luc ban thanh dai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thu nang ma hoi. hieu ((ve cam) or (ve cham)) luc ban thanh dai ((cua tre) or (cua triet))*.