Perhaps you should try some spelling variations:
truc van » truc va, thuc van, truc ban
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau treo
va cau » van cau, va cac, va dau
minh d » minh de, minh di, binh d

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((nang xa) or (lang xa)) hoi. lieu va cau truc van minh d ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (lang xa)) hoi. lieu va cau truc van minh d ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) or (lang xa)) hoi. lieu va cau truc van minh d ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (lang xa)) hoi. lieu va cau truc van minh d ((cuu tre) OR (cau tren))*.