Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
va xanh » va hanh, va anh, va banh
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((cac ky) or (sach y)) nang xa hoi. hieu van cau truc ((va xanh) OR (va danh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((cac ky) OR (sach y)) nang xa hoi. hieu van cau truc ((va xanh) OR (va danh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((cac ky) or (sach y)) nang xa hoi. hieu van cau truc ((va xanh) OR (va danh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((cac ky) or (sach y)) nang xa hoi. hieu van cau truc ((va xanh) OR (va danh)) di cua tre*.