Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
te sach » toc sach
sach uu » sach luu, sach tu, sach xu
uu nang » cuu nang, vu nang, cuu nong
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
hai cua » thai cua, dai cua, hoi cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach uu nang xa hoi. ((hieu va) OR (lieu va)) cau ((luc van) or (duc van)) hanh hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach uu nang xa hoi. ((hieu va) OR (lieu va)) cau ((luc van) OR (duc van)) hanh hai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach uu nang xa hoi. ((hieu va) OR (lieu va)) cau ((luc van) or (duc van)) hanh hai cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach uu nang xa hoi. ((hieu va) OR (lieu va)) cau ((luc van) or (duc van)) hanh hai cua tu*.