Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
xay thanh » day thanh, giay thanh, ngay thanh
thuc xay » thuc day, tuc xay, thuat xay
cau tren » dau tren, ca tren, cau treo
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve nham » ve nha, ve cham
cu tren » tu tren, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang xa hoi. hieu ve nham thuc xay thanh san ((cau tren) OR (cu tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ve nham thuc xay thanh san ((cau tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ve nham thuc xay thanh san ((cau tren) OR (cu tren))*.