Perhaps you should try some spelling variations:
thang minh » thong minh, thanh minh, thang binh
toan thang » toan thong, thanh thang, tran thanh
cong trong » cong thuong, duong trong, cong trinh
trong minh » truong minh, trong kinh, thong minh
giai toan » giai doan, giai toa, gioi toan
gioi cong » gioi dong, gioi song, nguoi cong
sach che » sach thue, sach nha, sach cap
hoach ha » hoach va, hoach xay, hoach hoi
tu sach » thu sach, su sach, te sach
ve giai » va giai, ve giao, de giai
ha vien » hoa vien, nhan vien, hoa viet
che ve » chep ve, che va, che vi

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 che ve giai toan thang minh ) or ( thu hoach ha vien gioi cong trong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach che ve giai toan thang minh ) OR ( thu hoach ha vien gioi cong trong minh )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach che ve giai toan thang minh ) or ( thu hoach ha vien gioi cong trong minh ))*.