Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
cham thu » cam thu, nham thu, pham thu
so sach » so sanh, bo sach, co sach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
cua tre » cua te, cuu tre, cua triet
thu va » thuc va, thue va, tu va
di cua » dai cua, doi cua, de 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)) ky tang xa hoi. hieu ve cham thu va hang di cua 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 thu va hang di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thuat san) or (so sach)) ky tang xa hoi. hieu ve cham thu va hang di cua tre*.