Perhaps you should try some spelling variations:
truc ban » thuc ban, truc dan, truc van
ban hanh » ban hang
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
hanh de » hanh ve, hanh kem
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
te sac » te sach, te cac, te san
ky cau » ky chau, ke cau

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

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