Perhaps you should try some spelling variations:
khanh hai » thanh hai, nhanh hai, nhanh thai
van khanh » van thanh, van hanh, van anh
chau tren » cau tren, chay tren, cu tren
hieu van » hieu va, thien van, lieu va
hai chau » lai chau, ha chau, hat chau
tu sach » thu sach, su sach, te sach
cau duc » cao duc, cau luc, cau truc
chu duc » thu duc, chua duoc, cuu duoc
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang x hoi. hieu van ((cau duc) OR (chu duc)) van khanh hai chau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu van ((cau duc) OR (chu duc)) van khanh hai chau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van ((cau duc) OR (chu duc)) van khanh hai chau tren*.