Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chay » van chat, san chay, toan chay
va thanh » gia thanh, ban thanh, va tinh
tu tieng » luc tieng, tu tuong, tu trong
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
chay tu » chay tui, chai tu, chay dua
va danh » va dinh, va dan, va hanh
su tien » su kien, su hien, dau tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang x ho. hieu van chay tu ((va thanh) or (va danh)) ki ((su tien) or (tu tieng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x ho. hieu van chay tu ((va thanh) OR (va danh)) ki ((su tien) OR (tu tieng)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x ho. hieu van chay tu ((va thanh) or (va danh)) ki ((su tien) or (tu tieng))*.