Perhaps you should try some spelling variations:
chau tre » chay tren, chau tho, cho tre
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
xuc va » duc va, tuc va, luc va
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa

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 ky tang ma hoi. hieu va cam ((xuc va) or (thuc va)) ((hanh lai) OR (hanh lam)) chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoi. hieu va cam ((xuc va) OR (thuc va)) ((hanh lai) OR (hanh lam)) chau tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang ma hoi. hieu va cam ((xuc va) or (thuc va)) ((hanh lai) OR (hanh lam)) chau tre*".