Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
hieu van » hieu va, thien van, lieu va
dai tien » dai tieng, dau tien, cai tien
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
vi hoi » vi hoc, va hoi, bi hoi
xuc va » duc va, tuc va, luc va
vi dai » si dai, li dai, vien dai

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 thi hanh vi hoi. hieu van cau xuc va tinh vi dai tien~.
• Adding a wildcard symbol may retrieve word variants: su sach thi hanh vi hoi. hieu van cau xuc va tinh vi dai tien*.