Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
nang cau » nang cao, hang cau, nang dau
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
sach ty » sach y, sach tu, sach thu
van cam » van nam, van lam, van cau
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (sach ty)) nang cau hoi. hieu van cam luc va hanh thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (sach ty)) nang cau hoi. hieu van cam luc va hanh thai cua te.
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sach ty)) nang cau hoi. hieu van cam luc va hanh thai cua te*.