Perhaps you should try some spelling variations:
thanh tien » thanh vien, thanh nien, thang tien
hieu van » hieu va, thien van, lieu va
tien cua » trien cua, tiep cua, dien cua
kho tang » cao tang
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau
tu sach » thu sach, su sach, te sach
ky tang » ky nang, ky dang, ky trong
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
cua te » cua tu

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