Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
thanh tra » thanh toan, thanh hoa
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
tra cua » trau cua, trua cua, tra cuu
cam tuc » cam xuc, nam thuc, dam thuc
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
cam tu » cam thu, nam tu, dam tu

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 (thuat san)) ky nang ma hoi. hieu ve ((cam tuc) OR (cam tu)) va thanh tra cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat san)) ky nang ma hoi. hieu ve ((cam tuc) OR (cam tu)) va thanh tra cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat san)) ky nang ma hoi. hieu ve ((cam tuc) OR (cam tu)) va thanh tra cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat san)) ky nang ma hoi. hieu ve ((cam tuc) OR (cam tu)) va thanh tra cua tre*.