Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va danh, ban hanh
ca tren » cau tren, cu tren, la tren
ty nang » ky nang, ty xang, ty hang
x hoi » xa hoi, o hoi, x ho
vi ca » vit ca, li ca, va ca

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 nang x hoi. hieu ((te ban) or (te bao)) co ((va hanh) or (va thanh)) vi ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x hoi. hieu ((te ban) OR (te bao)) co ((va hanh) OR (va thanh)) vi ca tren.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x hoi. hieu ((te ban) or (te bao)) co ((va hanh) or (va thanh)) vi ca tren*.