Perhaps you should try some spelling variations:
gianh lan » gian lan, gianh lai, gian dan
hoc sach » hoc sinh, hoc cac, hoc anh
cac truc » cau truc, cac tru, cac trung
va gianh » va gian, van giang, va giai
sach ky » sac ky, sach y, sach ty
hieu va » hieu qua
truc va » thuc va, thuc vat, trung va
cua tu » cua tuc, cua su, cua cu
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: hoc sach ky nang x hoi. ((hieu va) or (lieu va)) cac truc va gianh lan ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang x hoi. ((hieu va) OR (lieu va)) cac truc va gianh lan ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang x hoi. ((hieu va) or (lieu va)) cac truc va gianh lan ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang x hoi. ((hieu va) or (lieu va)) cac truc va gianh lan ((cua te) OR (cua tu))*.