Perhaps you should try some spelling variations:
hoi nang » ho nang, hoa nang, hoi dang
hoi lang » hoa lang, hoi dan
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
duc van » duc va, duc tan, duc manh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao

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 ((hoi nang) or (hoi lang)) xa hoi. hieu va cam duc van hanh hai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((hoi nang) OR (hoi lang)) xa hoi. hieu va cam duc van hanh hai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((hoi nang) or (hoi lang)) xa hoi. hieu va cam duc van hanh hai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi nang) or (hoi lang)) xa hoi. hieu va cam duc van hanh hai ((cua tre) OR (cuu tre))*.