Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
tu sach » thu sach, su sach, te sach
lam cua » nam cua, lam chat
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
y tang » ky tang, 6 tang, 5 tang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » truc va, tuc xa, duc va
7 tang » 6 tang
ve cam » ve cham, ve cac, va cam

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 ((y tang) OR (7 tang)) ma hoi. hieu ve cam ((tuc va) or (thuc va)) thanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y tang) OR (7 tang)) ma hoi. hieu ve cam ((tuc va) OR (thuc va)) thanh lam cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y tang) OR (7 tang)) ma hoi. hieu ve cam ((tuc va) or (thuc va)) thanh lam cua tre*".