Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
hoc dat » hoc dai, hoc phat, hoc chat
hang ve » hang va, hanh ve, hang ke
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua

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 ky nang mai hoi. hieu ve chat ((hoc dat) OR (hoc dan)) hang ve cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang mai hoi. hieu ve chat ((hoc dat) OR (hoc dan)) hang ve cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang mai hoi. hieu ve chat ((hoc dat) OR (hoc dan)) hang ve cua tre*.