Perhaps you should try some spelling variations:
angang duoc » ngang duoc, nganh duoc
duoc hoi » quoc hoi, duoc hoc, duoc si
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ve
thanh ha » thanh hoa, thanh hai, nhanh ha
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
sach hu » sach thu, sach ha, sach tu
nam luc » nang luc, nhan luc, nam thuc
luc va » duc va, tuc va, loc va

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 hu angang duoc hoi. hieu van nam luc va ((thanh va) OR (thanh ha)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hu angang duoc hoi. hieu van nam luc va ((thanh va) OR (thanh ha)) cau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach hu angang duoc hoi. hieu van nam luc va ((thanh va) OR (thanh ha)) cau tren*.