Perhaps you should try some spelling variations:
hang truc » khung truc
hieu van » hieu va, thien van, lieu va
hau truc » cau truc, hoc truc, tu truc
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. hieu van ((hau truc) or (hang truc)) ((va hanh) or (va thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu van ((hau truc) OR (hang truc)) ((va hanh) OR (va thanh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu van ((hau truc) or (hang truc)) ((va hanh) or (va thanh)) vai cua tre*.