Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
hanh tri » thanh tri, hanh tai, hanh triet
phat duc » pham duc, phan duc, phan duoc
van phat » va phat, van chat, van phan
van hoi » van hoa, van hoc, van hoe
ky lang » ky dang, ky tang, tay lang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((ky lang) or (ky nang)) van hoi. hieu van phat duc va ((hanh tri) OR (hanh trinh)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ky lang) OR (ky nang)) van hoi. hieu van phat duc va ((hanh tri) OR (hanh trinh)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((ky lang) or (ky nang)) van hoi. hieu van phat duc va ((hanh tri) OR (hanh trinh)) cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ky lang) or (ky nang)) van hoi. hieu van phat duc va ((hanh tri) OR (hanh trinh)) cua te*.