Perhaps you should try some spelling variations:
kham duc » pham duc, kham cuoc, pham duy
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va
dan dau » danh dau, doan dau, van dau
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
va dan » ca dan, va dao, va dau

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 va) OR (hieu qua)) kham duc va dan dau cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. ((hieu va) OR (hieu qua)) kham duc va dan dau cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. ((hieu va) OR (hieu qua)) kham duc va dan dau cua tre*.