Perhaps you should try some spelling variations:
toan vai » toan tai, toan va, toan bai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
su tinh » su tich, so tinh, tu tinh
vai cua » dai cua, hai cua, lai cua
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu ((ve cam) or (ve cac)) su tinh toan vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((ve cam) OR (ve cac)) su tinh toan vai cua te*.