Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
toc sach » hoc sach, doc sach, thuoc sach
ky tang » ky nang, ky dang, kho tang
hieu va » lieu va, hieu qua
lam cuu » lam chu, lam cua, cham cuu
cuu tre » cua tre, cau tren, cau treo
y tang » 6 tang, 7 tang, 5 tang
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: toc sach ((y tang) OR (ky tang)) ma hoi. hieu va ((pham duy) or (pham duc)) gia thanh lam cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y tang) OR (ky tang)) ma hoi. hieu va ((pham duy) OR (pham duc)) gia thanh lam cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y tang) OR (ky tang)) ma hoi. hieu va ((pham duy) or (pham duc)) gia thanh lam cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y tang) OR (ky tang)) ma hoi. hieu va ((pham duy) or (pham duc)) gia thanh lam cuu tre*.