Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
thu sach » tu sach, thuoc sach, thu hoach
luat tuc » luat thue
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu
tuc va » thuc va, truc va, tuc xa
y nang » ky nang, ly nang, v nang

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) OR (thuat sach)) y nang xa hoi. ((hieu va) or (thien van)) luat tuc va hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) y nang xa hoi. ((hieu va) OR (thien van)) luat tuc va hanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) y nang xa hoi. ((hieu va) or (thien van)) luat tuc va hanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) y nang xa hoi. ((hieu va) or (thien van)) luat tuc va hanh vi cua tu*.