Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh le » thinh le, thanh ve, thanh de
te sach » toc sach
hieu ve » hieu va, hieu van
ve cuoc » va cuoc, ve duoc, ve nuoc
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va
loc va » hoc va
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuat sach)) ky nang ma hoi. hieu ve cuoc ((luc va) OR (loc va)) thanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat sach)) ky nang ma hoi. hieu ve cuoc ((luc va) OR (loc va)) thanh le cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat sach)) ky nang ma hoi. hieu ve cuoc ((luc va) OR (loc va)) thanh le cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat sach)) ky nang ma hoi. hieu ve cuoc ((luc va) OR (loc va)) thanh le cua tre*.