Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
van hang » van khang, van hoang, van thang
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, xuc ban
hang di » hang doi, hang vi, hang dien
ve cam » ve cham, ve cac, va cam
di su » doi su, ki su, da su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuoc sach)) y ((nang xa) or (nang ma)) hoi. hieu ve cam xuc van hang di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) y ((nang xa) OR (nang ma)) hoi. hieu ve cam xuc van hang di su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) y ((nang xa) or (nang ma)) hoi. hieu ve cam xuc van hang di su triet*".