Perhaps you should try some spelling variations:
chau viet » chu viet, khau viet, cham viet
thu sach » tu sach, thuat sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
tai chau » lai chau, mai chau, hai chau
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
vuc van » duc van, thuc van, chuc van
luc van » luoc van, luu van, duc van

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) or (su sach)) ky nang x ho. hieu ve chat ((vuc van) or (luc van)) hanh tai chau viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang x ho. hieu ve chat ((vuc van) OR (luc van)) hanh tai chau viet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang x ho. hieu ve chat ((vuc van) or (luc van)) hanh tai chau viet*.