Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hang tai » hang va, dung tai
sach thu » sach thue, sach thieu, sach tham
nang mai » nang ma, nang tai, lang mai
tai cau » tai cac, tai cao
sach ty » sach y, sach tu, xach tay
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va

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)) nang mai hoi. hieu ve cac ((xuc va) or (duc va)) hang tai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang mai hoi. hieu ve cac ((xuc va) OR (duc va)) hang tai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach thu)) nang mai hoi. hieu ve cac ((xuc va) or (duc va)) hang tai cau tren".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach thu)) nang mai hoi. hieu ve cac ((xuc va) or (duc va)) hang tai cau tren*.