Perhaps you should try some spelling variations:
thien van » thi van
khang di » hang di, khang vi, khang voi
thuc van » thuc vat, thuc dan, thuc hanh
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
cu lang » cua lang, xu lang, chi lang
tu lang » tu lanh, xu lang, tu quang
di cua » dai cua, doi cua, de cua
cua te » cua tu

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 lang) OR (cu lang)) xa hoi. thien van nam ((thuc van) or (thuc va)) khang di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu lang) OR (cu lang)) xa hoi. thien van nam ((thuc van) OR (thuc va)) khang di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu lang) OR (cu lang)) xa hoi. thien van nam ((thuc van) or (thuc va)) khang di cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu lang) OR (cu lang)) xa hoi. thien van nam ((thuc van) or (thuc va)) khang di cua te*.