Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, danh va, doanh van
thuc dan » thuc hanh, hoc dan
vai cua » dai cua, hai cua, lai cua
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
thuc va » thuc day
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. hieu va cao ((((thuc va) OR (thuc vat))) or (thuc dan)) danh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu va cao ((((thuc va) OR (thuc vat))) OR (thuc dan)) danh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu va cao ((((thuc va) OR (thuc vat))) or (thuc dan)) danh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu va cao ((((thuc va) OR (thuc vat))) or (thuc dan)) danh vai cua triet*.