Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
xuc ban » duc ban, cuc ban, quoc ban
luc van » luoc van, luu van, duc van
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
tu nang » tru nang, tu nong, tu nano
ve cac » va cac, vien cac
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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 tu nang mai hoi. hieu ve cac ((luc van) or (xuc ban)) hanh tai ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang mai hoi. hieu ve cac ((luc van) OR (xuc ban)) hanh tai ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang mai hoi. hieu ve cac ((luc van) or (xuc ban)) hanh tai ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang mai hoi. hieu ve cac ((luc van) or (xuc ban)) hanh tai ((cua tu) OR (cua su))*.