Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh tai » thanh tai, hang tai, han tai
hieu cao » chieu cao, hieu cac, hieu ca
thuc van » thuc vat, thuc dan, thuc va
vuc van » duc van, luc van, chuc van
tai cua » thai cua, tai cuc, tri cua
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
xuc van » duc van, luc van, xuc ban
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 ty nang o hoi. hieu cao chat ((xuc van) or (((vuc van) OR (thuc van)))) hanh tai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang o hoi. hieu cao chat ((xuc van) OR (((vuc van) OR (thuc van)))) hanh tai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang o hoi. hieu cao chat ((xuc van) or (((vuc van) OR (thuc van)))) hanh tai cua viet*".