Perhaps you should try some spelling variations:
cham doc » cham soc, chat doc, chau doc
te sach » toc sach
bai cua » ban cua, bai ca, hai cua
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu van
y nang » ky nang, ly nang, v nang
doc va » duoc va, hoc va, duc va
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: te sach y nang ma hoi. ((hieu ve) OR (hieu va)) cham doc va danh ((bai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. ((hieu ve) OR (hieu va)) cham doc va danh ((bai cua) OR (dai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. ((hieu ve) OR (hieu va)) cham doc va danh ((bai cua) or (dai cua)) tre*".