Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
truc va » thuc va, thuc vat, trung va
kinh ve » kinh te, dinh ve, minh ve
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, xach tay
ve cua » le cua, de cua, te cua
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
cua te » cua tu

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 ty) or (sach thu)) lang xa hoi. hieu ve cam ((xuc va) or (truc va)) kinh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) lang xa hoi. hieu ve cam ((xuc va) OR (truc va)) kinh ve cua te.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach thu)) lang xa hoi. hieu ve cam ((xuc va) or (truc va)) kinh ve cua te*.