Perhaps you should try some spelling variations:
thau tay » thau xay, thai tay, thau tam
lang mai » lang dai, lang hai, lang man
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thai cua » than cua, tai cuc, tri cua
ky lang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
nam hoc » nam moc, nam hoi, am hoc
tai cua » tai cuc, tri cua, dai cua
tay ky » tap ky, tan ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thau tay ky lang mai hoi. hieu van nam hoc va thanh ((tai cua) OR (thai cua)) tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thau tay ky lang mai hoi. hieu van nam hoc va thanh ((tai cua) OR (thai cua)) tu".
• Adding a wildcard symbol may retrieve word variants: thau tay ky lang mai hoi. hieu van nam hoc va thanh ((tai cua) OR (thai cua)) tu*.