Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
cau treo » cau tren, cau triet, cau trieu
va hanh » van hanh, va thanh, va danh
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
sach v » sach va, sach 2, sach vay
ve coc » ve cuoc, ve cac, ve co
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach v) OR (sach y)) nang ma hoi. hieu ve coc luc va hanh vi ((cau treo) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach y)) nang ma hoi. hieu ve coc luc va hanh vi ((cau treo) OR (cau theo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) OR (sach y)) nang ma hoi. hieu ve coc luc va hanh vi ((cau treo) or (cau theo))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) OR (sach y)) nang ma hoi. hieu ve coc luc va hanh vi ((cau treo) or (cau theo))*.