Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
danh sai » dung sai, danh bat, danh dau
danh dai » danh dau, danh di, vanh dai
te sach » toc sach
cac hoc » cach hoc, cac hop, bac hoc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac

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