Perhaps you should try some spelling variations:
thu thanh » thu thang, tu thanh, thuan thanh
va triet » va thiet, va trien, ve triet
thu hanh » thuc hanh, thuy hanh, thi hanh
hanh lam » thanh lap, hanh kem, hanh va
te sach » toc sach
hieu ve » hieu va, hieu van
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
lam va » nam va, dam va, lam ha
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: te sach ((thu hanh) or (thu thanh)) xa hoi. hieu ve cam ((xuc va) OR (tuc va)) hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu hanh) OR (thu thanh)) xa hoi. hieu ve cam ((xuc va) OR (tuc va)) hanh lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu hanh) or (thu thanh)) xa hoi. hieu ve cam ((xuc va) OR (tuc va)) hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu hanh) or (thu thanh)) xa hoi. hieu ve cam ((xuc va) OR (tuc va)) hanh lam va triet*.