Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
bieu thien » bieu hien, dieu khien, bien phien
hach xuan » bach xuan, thanh xuan, hoach luan
van hang » van khang, van hoang, van thang
thu sach » thuat sach, thuoc sach, thu hoach
xuan van » luan van, quan van, xuan can
tu sach » su sach, tu cach, vu sach
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
va cuu » va cau, va chu, va huu
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: ((((tu sach) OR (thu sach))) or (te sach)) ky nang ma hoi. bieu thien hach xuan van hang va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (te sach)) ky nang ma hoi. bieu thien hach xuan van hang va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (thu sach))) or (te sach)) ky nang ma hoi. bieu thien hach xuan van hang va cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (thu sach))) or (te sach)) ky nang ma hoi. bieu thien hach xuan van hang va cuu tre*.