Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
van cam » van nam, van lam, van cau
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
xuc va » tuc va, luc va, xac 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: ((tu cach) or (thu sach)) ky tang xa hoi. hieu van cam ((xuc va) or (duc va)) danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thu sach)) ky tang xa hoi. hieu van cam ((xuc va) OR (duc va)) danh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thu sach)) ky tang xa hoi. hieu van cam ((xuc va) or (duc va)) danh di cua tre*.