Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, hieu ve
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
cau tren » cu tren, dau tren, ca tren
nam tu » nam thu, nam thuc
vi cau » va cau, ve cau, di cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((thu nang) OR (thu hang)) x hoi. ((hieu van) or (lieu va)) nam tu va thanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((thu nang) OR (thu hang)) x hoi. ((hieu van) OR (lieu va)) nam tu va thanh vi cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((thu nang) OR (thu hang)) x hoi. ((hieu van) or (lieu va)) nam tu va thanh vi cau tren*".