Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hang vi » hanh vi, hang di, khang voi
cham tu » pham tu, cam tu, chai tu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat san) or (so sach)) ky tang xa hoi. hieu ve cham tu va ((hang vi) OR (hang va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat san) OR (so sach)) ky tang xa hoi. hieu ve cham tu va ((hang vi) OR (hang va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat san) or (so sach)) ky tang xa hoi. hieu ve cham tu va ((hang vi) OR (hang va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat san) or (so sach)) ky tang xa hoi. hieu ve cham tu va ((hang vi) OR (hang va)) cuu tre*.