Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hieu van » hieu va, thien van, lieu va
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va
va danh » va dinh, va dan, va hanh
cac hoc » cach hoc, cac hop, bac hoc
vi cua » vai cua, di cua
cua te » cua tu
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) or (thuat san)) ky nang ma hoi. ((hieu ve) OR (hieu van)) cac hoc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat san)) ky nang ma hoi. ((hieu ve) OR (hieu van)) cac hoc va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat san)) ky nang ma hoi. ((hieu ve) OR (hieu van)) cac hoc va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat san)) ky nang ma hoi. ((hieu ve) OR (hieu van)) cac hoc va danh vi cua te*.