Perhaps you should try some spelling variations:
tinh lam » trinh lam, dinh lam, tinh lao
sach thu » sach thue, sach thieu, sach tham
va cham » va chat, va tham
lam cua » nam cua, lam chat
va tinh » may tinh
vu cham » vu kham, tu cham, qua cham
sach ty » sach y, sach tu, xach tay
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
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: su ((sach ty) OR (sach thu)) tang ma hoi. hieu ((vu cham) or (va cham)) duc va tinh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) tang ma hoi. hieu ((vu cham) OR (va cham)) duc va tinh lam cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach thu)) tang ma hoi. hieu ((vu cham) or (va cham)) duc va tinh lam cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach thu)) tang ma hoi. hieu ((vu cham) or (va cham)) duc va tinh lam cua tre*.