Perhaps you should try some spelling variations:
thien van » thi van
sach ky » sach y, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
la tren » loai tren, dua tren, dat tren
sac ky » cac ky, sai ky
nam tu » nam thu, nam thuc
x hoi » o hoi, x ho, 5 hoi
vi la » vi lua, vi ha, gi la

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 ky) or (sac ky)) nang ((x hoi) or (xa hoi)). thien van nam tu va hanh vi la tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang ((x hoi) OR (xa hoi)). thien van nam tu va hanh vi la tren.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang ((x hoi) or (xa hoi)). thien van nam tu va hanh vi la tren*.