Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach thi » sach thu, sach tai, sach thieu
thi hang » thi hanh, thi nang, thi hong
danh tai » doanh tai, dinh tai, hanh tai
dan danh » van danh, han danh, ban danh
thuc dan » thuc hanh, hoc dan, thuc vat
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
va tham » van tham, va cham, va thuat
ca hoi » cau hoi, cua hoi, co hoi
tai ve » tai va, tai he, tai le

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 thi hang ((ca hoi) or (xa hoi)). hieu ((va tham) OR (va thanh)) thuc dan danh tai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thi hang ((ca hoi) OR (xa hoi)). hieu ((va tham) OR (va thanh)) thuc dan danh tai ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thi hang ((ca hoi) or (xa hoi)). hieu ((va tham) OR (va thanh)) thuc dan danh tai ve triet".
• Adding a wildcard symbol may retrieve word variants: te sach thi hang ((ca hoi) or (xa hoi)). hieu ((va tham) OR (va thanh)) thuc dan danh tai ve triet*.