Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
nam duoc » nam thuoc, da duoc, dat duoc
lam duc » lam duoc, pham duc, lam dung
luu tre » luu tru, cuu tre, luy tre
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi luu » vi lua
o hoi » co hoi, o hoc, o hai

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 y nang o hoi. ((lieu va) or (thien van)) ((lam duc) OR (nam duoc)) va dan vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang o hoi. ((lieu va) OR (thien van)) ((lam duc) OR (nam duoc)) va dan vi luu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang o hoi. ((lieu va) or (thien van)) ((lam duc) OR (nam duoc)) va dan vi luu tre*".