Perhaps you should try some spelling variations:
truc ban » thuc ban, truc dan, truc van
ban hanh » ban hang
cu tren » tu tren, dua tren
cua tre » cua te, cuu tre, cua triet
hanh de » hanh ve, hanh kem
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sac ky » cac ky
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sai ky) OR (sac ky)) nang xa hoi. hieu ve cau truc ban hanh de ((cua tre) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sai ky) OR (sac ky)) nang xa hoi. hieu ve cau truc ban hanh de ((cua tre) OR (cu tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sai ky) OR (sac ky)) nang xa hoi. hieu ve cau truc ban hanh de ((cua tre) or (cu tren))*".