Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hieu van » hieu va, thien van, lieu va
cham thu » cam thu, nham thu, pham thu
van cham » van chat, van tham, va cham
co sach » bo sach, cuon sach, hoc sach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
so sach » so sanh, bo sach, hoc sach
va hang » van hang, va nang, va lang
hang vi » hang va, hanh vi, hang di
cua tre » cua te, cuu tre, cua triet
thu va » thuc va, thue va, tu va
vi cua » vai cua, di cua

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) OR (co sach)))) ky tang xa hoi. hieu van cham thu va hang vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat san) OR (((so sach) OR (co sach)))) ky tang xa hoi. hieu van cham thu va hang vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat san) or (((so sach) OR (co sach)))) ky tang xa hoi. hieu van cham thu va hang vi cua tre*".