Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
hanh tai » thanh tai, hang tai, hinh tai
tu sach » thu sach, su sach, te sach
han tai » hang tai, nhan tai, van tai
cua tre » cua te, cuu tre, cua triet
thuc va » thuc vat, thuc day
thi van » thi lan, thi hanh, thi nang
lang xa » lang ha, dang xay, lang van
sach v » sach va, sach y, sach 2
v lang » va lang, o lang, _ lang

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