Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ty » sach ty
hieu van » hieu va, thien van, lieu va
van chat » cao chat
tu tieng » luc tieng, tu tuong, tu trong
ty nang » ky nang, ty xang, ty hang
chat tu » nhat tu, chai tu, chay tu
va tinh » may tinh
va danh » va dinh, va dan, va hanh
kien » bien, vien, 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 khach ty nang x ho. hieu van chat tu ((va tinh) or (va danh)) ki ((tu tieng) or (su kien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ty nang x ho. hieu van chat tu ((va tinh) OR (va danh)) ki ((tu tieng) OR (su kien)).
• Adding a wildcard symbol may retrieve word variants: vu khach ty nang x ho. hieu van chat tu ((va tinh) or (va danh)) ki ((tu tieng) or (su kien))*.