Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
danh diem » danh dien, dinh diem, dac diem
dau tren » dau tien, dat tren, dau tieng
diem dau » diem cau, diem du, dem dau
van bac » van ban, van bao, van hac
ta danh » tac danh, tao danh, tap danh
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
van cac » van hac, van cau, dan cac
ma hoi » mai hoi, xa hoi, ma hoa
toc ta » toc tay, toc thai

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 ((van cac) OR (van bac)) toc ta danh diem dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat sach)) ky nang ma hoi. hieu ((van cac) OR (van bac)) toc ta danh diem dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat sach)) ky nang ma hoi. hieu ((van cac) OR (van bac)) toc ta danh diem dau tren".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat sach)) ky nang ma hoi. hieu ((van cac) OR (van bac)) toc ta danh diem dau tren*.