Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hanh dam » thanh dam, hanh lam, hanh nam
sach tai » sach bai, sach tham, sach dao
sach thi » sach thu, sach thieu, sach tham
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
hanh xa » hanh va, hanh ma, hanh xu
ve cam » ve cac, va cam, ve cai
dam va » dam van, nam va, dam ha

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) OR (sach tai)) hanh xa hoi. hieu ((ve cam) or (ve cham)) truc va hanh dam va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thi) OR (sach tai)) hanh xa hoi. hieu ((ve cam) OR (ve cham)) truc va hanh dam va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thi) OR (sach tai)) hanh xa hoi. hieu ((ve cam) or (ve cham)) truc va hanh dam va trien".
• Adding a wildcard symbol may retrieve word variants: te ((sach thi) OR (sach tai)) hanh xa hoi. hieu ((ve cam) or (ve cham)) truc va hanh dam va trien*.