Perhaps you should try some spelling variations:
thien van » thi van
chau viet » chu viet, khau viet, cham viet
hanh lai » hanh lam, hanh tai, thanh lap
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cac » van hac, van cau, van bac
luc va » tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang x ho. thien van cac ((luc va) or (duc va)) hanh lai chau viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x ho. thien van cac ((luc va) OR (duc va)) hanh lai chau viet.
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x ho. thien van cac ((luc va) or (duc va)) hanh lai chau viet*.