Perhaps you should try some spelling variations:
gian bana » gian ban, gian dan, gian lang
hoc sach » hoc sinh, hoc cac, hoc anh
bana cua » ban cua, manh cua, mang cua
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cua te » cua tu
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 ty nang x hoi. ((hieu va) or (lieu va)) cac ((xuc van) OR (duc van)) gian bana cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty nang x hoi. ((hieu va) OR (lieu va)) cac ((xuc van) OR (duc van)) gian bana cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ty nang x hoi. ((hieu va) or (lieu va)) cac ((xuc van) OR (duc van)) gian bana cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach ty nang x hoi. ((hieu va) or (lieu va)) cac ((xuc van) OR (duc van)) gian bana cua te*.