Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach thi » sach thu, sach tai, sach thieu
hanh dam » thanh dam, hanh lam, hanh nam
vien cac » vien bach, vien dai, vien da
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
hanh xa » hanh ma, hanh xu, canh xa
dam ve » dap ve, dau ve, dam me
ve cam » ve cham, ve cac, 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: tu sach thi ((hanh xa) OR (hanh va)) hoi. hieu ((ve cam) or (vien cac)) thuc va hanh dam ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi ((hanh xa) OR (hanh va)) hoi. hieu ((ve cam) OR (vien cac)) thuc va hanh dam ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi ((hanh xa) OR (hanh va)) hoi. hieu ((ve cam) or (vien cac)) thuc va hanh dam ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach thi ((hanh xa) OR (hanh va)) hoi. hieu ((ve cam) or (vien cac)) thuc va hanh dam ve triet*.