Perhaps you should try some spelling variations:
chat tuc » chat xuc, luat tuc, chat huu
su sach » so sach, vu sach
ty nang » ty xang, ty hang, ly nang
hieu va » hieu qua
va dinh » van dinh, va kinh, va tinh
dinh ve » dinh ket, dinh van
lua tre » cua tre, luy tre, dua tren
tuc va » thuc va, truc va, tuc xa
ve lua » ve luat, ve mua, ve cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) or (lieu va)) chat tuc va dinh ve lua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) OR (lieu va)) chat tuc va dinh ve lua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) or (lieu va)) chat tuc va dinh ve lua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) or (lieu va)) chat tuc va dinh ve lua tre*.