Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
trang va » tran van, hang va
su triet » su tien, ve triet
su sach » so sach, vu sach
thuc va » thuc vat, thuc dan, thuc day
su viet » so viet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
sach 2 » sach y
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa
2 nang » v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach 2 nang ma hoi. hieu ve cam ((trang va) or (thuc va)) thanh dam ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach 2 nang ma hoi. hieu ve cam ((trang va) OR (thuc va)) thanh dam ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach 2 nang ma hoi. hieu ve cam ((trang va) or (thuc va)) thanh dam ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: su sach 2 nang ma hoi. hieu ve cam ((trang va) or (thuc va)) thanh dam ((su triet) OR (su viet))*.