Perhaps you should try some spelling variations:
thuat duoc » thuat quoc, thuat doc, thuat do
thuat sach » thuat lanh, thuat san
thuat dbo » thuat do, thuat dao, thuat co
ty thuat » ky thuat, my thuat, te thuat
sach ty » sach y, sach tu, sach thu
thuat o » thuat do
o khi » co khi, bo khi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hoach su ((thuat dbo) OR (thuat duoc)) khi ) or ( thuat sach ty thuat o khi ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach su ((thuat dbo) OR (thuat duoc)) khi ) OR ( thuat sach ty thuat o khi )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu hoach su ((thuat dbo) OR (thuat duoc)) khi ) or ( thuat sach ty thuat o khi ))".
• Adding a wildcard symbol may retrieve word variants: (( thu hoach su ((thuat dbo) OR (thuat duoc)) khi ) or ( thuat sach ty thuat o khi ))*.