Perhaps you should try some spelling variations:
thien van » thi van
chu bang » thu bang, chuc nang, chu quang
cam thuc » am thuc, nam thuc, cam thu
thu sach » tu sach, thuat sach, thuoc sach
thu lang » thu hang, thu bang, tho lang
phu lang » phap lang, phu khang, phu luong
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh ca » hanh cac, hanh cat, hanh cua
cua tre » cua te, cuu tre, cua triet
ca cua » co 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 sach ((((thu lang) OR (phu lang))) or (chu bang)) xa hoi. thien van cam thuc va hanh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((((thu lang) OR (phu lang))) OR (chu bang)) xa hoi. thien van cam thuc va hanh ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((((thu lang) OR (phu lang))) or (chu bang)) xa hoi. thien van cam thuc va hanh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((((thu lang) OR (phu lang))) or (chu bang)) xa hoi. thien van cam thuc va hanh ca cua tre*.