Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
danh va » doanh va, hanh va, anh va
thuc va » thuc vat, thuc dan
su sach » so sach
nang co » nang cao, nang doc, nang noi
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, vu khach
hieu va » lieu va, hieu qua
co hoi » co hoc, co loi
va cua » va chua, via cua, ca cua
va am » va lam, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (vu sach)) ty nang co hoi. hieu va am ((thuc va) or (thuc day)) danh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty nang co hoi. hieu va am ((thuc va) OR (thuc day)) danh va cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ty nang co hoi. hieu va am ((thuc va) or (thuc day)) danh va cua triet*".