Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
hanh lai » hanh lam, hanh tai, thanh lap
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
tuc va » truc va, duc va, thuc vat
ve cam » ve cham, ve cac, va cam
lai ve » loai ve, lai va, la ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thi hanh xa hoi. hieu ve cam ((((tuc va) OR (tuc xa))) or (thuc va)) hanh lai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi hanh xa hoi. hieu ve cam ((((tuc va) OR (tuc xa))) OR (thuc va)) hanh lai ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thi hanh xa hoi. hieu ve cam ((((tuc va) OR (tuc xa))) or (thuc va)) hanh lai ve triet*".