Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
van tham » van thanh, van tuan, van chat
hanh tai » thanh tai, hang tai, han tai
vu sach » vu bach, su sach, vu khach
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
soc va » hoc va, loc va, doc va
tai su » tai so, tai tu, lai su

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 y nang cau hoi. thien ((va cham) or (van tham)) soc va hanh tai su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang cau hoi. thien ((va cham) OR (van tham)) soc va hanh tai su tien.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang cau hoi. thien ((va cham) or (van tham)) soc va hanh tai su tien*.