Perhaps you should try some spelling variations:
hang hai » hoang hai, hang tai, thanh hai
danh hai » dang hai, lanh hai, manh hai
thuc dan » thuc hanh, hoc dan, thuc vat
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cuu tre, cua triet
thuc va » thuc vat, thuc day
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nang xa hoi. lieu va co ((thuc va) OR (thuc dan)) ((danh hai) or (hang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. lieu va co ((thuc va) OR (thuc dan)) ((danh hai) OR (hang hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang xa hoi. lieu va co ((thuc va) OR (thuc dan)) ((danh hai) or (hang hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. lieu va co ((thuc va) OR (thuc dan)) ((danh hai) or (hang hai)) cua tre*.