Perhaps you should try some spelling variations:
danh viet » anh viet, ninh viet, nang viet
cua triet » cua viet, su triet, va triet
doc sach » hoc sach, toc sach, nuoc sach
thuc day » thuc dan
viet cua » viec cua, viet ca, viet qua
nang ma » tang ma, sang ma, nang cao
va tham » van tham, va cham, va thanh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach y nang ma hoi. lieu va tham ((thuc vat) or (thuc day)) danh viet cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach y nang ma hoi. lieu va tham ((thuc vat) OR (thuc day)) danh viet cua triet.
• Adding a wildcard symbol may retrieve word variants: doc sach y nang ma hoi. lieu va tham ((thuc vat) or (thuc day)) danh viet cua triet*.