Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
sach ty » sach y, sach thu, xach tay
toc gia » toc giay, tac gia, hoc giao
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
sach tu » sach thu, cach tu, sach uu
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
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 tu)) nang mai hoi. hieu ve cam ((toc gia) or (quoc gia)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) nang mai hoi. hieu ve cam ((toc gia) OR (quoc gia)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach tu)) nang mai hoi. hieu ve cam ((toc gia) or (quoc gia)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach tu)) nang mai hoi. hieu ve cam ((toc gia) or (quoc gia)) hanh vi cua te*.