Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
nam truc » nam truoc, nam thuc, nam trung
lam truc » lam truoc, lam thuoc, lam trung
y nang » ky nang, ly nang, v nang
de cau » ke cau, ve cau, da cau
le cau » ke cau, le mau, le cap
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: thu sach y nang x hoi. thien van ((lam truc) or (nam truc)) va thanh ((de cau) OR (le cau)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. thien van ((lam truc) OR (nam truc)) va thanh ((de cau) OR (le cau)) treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. thien van ((lam truc) or (nam truc)) va thanh ((de cau) OR (le cau)) treo".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. thien van ((lam truc) or (nam truc)) va thanh ((de cau) OR (le cau)) treo*.