Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
tai cua » thai cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
hang xa » hoang xa, hang ca, lang xa
va tam » van tam, va tham, va tap
va tac » va cac

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

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