Perhaps you should try some spelling variations:
tay tang » tay lang, tay trung, tay quang
cua viet » ca viet, hoa viet, cua dieu
sach tay » xach tay, sach hay, sach nay
co sach » bo sach, cuon sach, hoc sach
truc va » thuc va, thuc vat, trung va
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
danh vi » hanh vi, dinh vi, danh di
tuc va » thuc va, tuc xa, duc va
ve cam » ve cham, ve cac, va cam
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: co sach tay tang ma hoi. hieu ve cam ((tuc va) OR (truc va)) danh vi ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach tay tang ma hoi. hieu ve cam ((tuc va) OR (truc va)) danh vi ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach tay tang ma hoi. hieu ve cam ((tuc va) OR (truc va)) danh vi ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: co sach tay tang ma hoi. hieu ve cam ((tuc va) OR (truc va)) danh vi ((cua viet) or (cua vat))*.