Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
tay lang » tai lang, tay tang, tay quang
sach tay » xach tay, sach hay, sach nay
te sach » toc sach
dam van » dao van, nam van, pham van
lang xa » lang ha, dang xay, lang van
dai lao » dai lan, dai thao, dai luan
van cua » vang cua, ban cua, dan cua
dam lan » dam phan, pham lan, dam tang
va dinh » van dinh, va kinh, va tinh
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 tay lang xa hoi. hieu vien ((dai lao) or (((dam lan) OR (dam van)))) va dinh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tay lang xa hoi. hieu vien ((dai lao) OR (((dam lan) OR (dam van)))) va dinh van cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tay lang xa hoi. hieu vien ((dai lao) or (((dam lan) OR (dam van)))) va dinh van cua te".
• Adding a wildcard symbol may retrieve word variants: te sach tay lang xa hoi. hieu vien ((dai lao) or (((dam lan) OR (dam van)))) va dinh van cua te*.