Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach phu » sach thu, sach phat, sach thue
hieu van » hieu va, thien van, hieu ve
lam thuc » lam thuoc, am thuc, nam thuc
dong xay » dang xay, cong xay, mong xay
phu dong » phuc dong, pho dong, chu dong
cau tren » cu tren, dau tren, ca tren
xay hoi » xa hoi, tay hoi, cay phoi
thuc va » thuc vat, thuc dan, thuc day
dan lai » dan loai, dan lap, dan lat
cuu tre » cua tre, cau treo
va dan » ca dan, va dao, va dau

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 phu dong xay hoi. ((hieu van) or (lieu va)) lam thuc va dan lai ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach phu dong xay hoi. ((hieu van) OR (lieu va)) lam thuc va dan lai ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach phu dong xay hoi. ((hieu van) or (lieu va)) lam thuc va dan lai ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach phu dong xay hoi. ((hieu van) or (lieu va)) lam thuc va dan lai ((cuu tre) OR (cau tren))*.