Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
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 ((sac ky) or (sach y)) nang xa hoi. ((hieu van) OR (lieu va)) cau truc va danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (sach y)) nang xa hoi. ((hieu van) OR (lieu va)) cau truc va danh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) or (sach y)) nang xa hoi. ((hieu van) OR (lieu va)) cau truc va danh di cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (sach y)) nang xa hoi. ((hieu van) OR (lieu va)) cau truc va danh di cua tre*.