Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
xang cao » nang cao, lang cao, quang cao
tu xang » ty xang, tu lang, tu quang
cao hoi » cau hoi, co hoi, cao hoc
ve cham » ve chat, vu cham, ve chim
sach tu » sach thu, cach tu, sach ty
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
vai va » dai va, hai va, lai va
tuc va » thuc va, truc va, tuc xa
thiet » thieu

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 tu xang cao hoi. hieu ((ve cham) OR (va cham)) tuc va hanh ((vai va) or (mai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tu xang cao hoi. hieu ((ve cham) OR (va cham)) tuc va hanh ((vai va) OR (mai va)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach tu xang cao hoi. hieu ((ve cham) OR (va cham)) tuc va hanh ((vai va) or (mai va)) thiet".
• Adding a wildcard symbol may retrieve word variants: thu sach tu xang cao hoi. hieu ((ve cham) OR (va cham)) tuc va hanh ((vai va) or (mai va)) thiet*.