Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
ve triet » va trien, su triet
hang tai » hang va, dung tai
su sach » so sach, vu sach
tinh ve » trinh ve, tinh ven, dinh ve
va tinh » may tinh
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
su tien » su kien, su hien, tu tieng
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc 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 thu ((nang ma) or (hang tai)) hoi. hieu ve cam xuc va tinh ve ((ve triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((nang ma) OR (hang tai)) hoi. hieu ve cam xuc va tinh ve ((ve triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: su sach thu ((nang ma) or (hang tai)) hoi. hieu ve cam xuc va tinh ve ((ve triet) or (su tien))*.