Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
thu sach » tu sach, thuat sach, thuoc sach
hang tai » hang va
su triet » su viet, ve triet
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
ve cham » va cham, ve chat, vu cham
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
su tien » su kien, su hien, tu tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ly ((hang tai) or (dung tai)) hai. hieu ve cham truc va danh vi ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly ((hang tai) OR (dung tai)) hai. hieu ve cham truc va danh vi ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: thu sach ly ((hang tai) or (dung tai)) hai. hieu ve cham truc va danh vi ((su triet) or (su tien))*.