Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
va thanh » gia thanh, ban thanh, va tinh
lam cua » nam cua, lam chat
ky sang » ky nang, ky dang, ky tang
tay hoi » tay ho, tay thai
tao hoi » tao khoi, tao boi, thao hoc
v pham » vi pham, d pham
cua te » cua tu
hieu v » hieu va, hieu ve, hieu 2

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) or (doc sach)) ky sang ((tay hoi) OR (tao hoi)). hieu v pham duc va thanh lam cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky sang ((tay hoi) OR (tao hoi)). hieu v pham duc va thanh lam cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (doc sach)) ky sang ((tay hoi) OR (tao hoi)). hieu v pham duc va thanh lam cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ky sang ((tay hoi) OR (tao hoi)). hieu v pham duc va thanh lam cua te*.