Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham luc » cham soc, nhan luc, cham cuu
vai cua » dai cua, hai cua, lai cua
luc van » luoc van, luu van, duc van
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
sach ly » sach lo, sach ty, sach hay
hang ca » hang va, nang cao, hang tai
ca hoi » cau hoi, cua hoi, xa hoi
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc ((sach ly) or (sach y)) hang ca hoi. hieu ve cham luc van hanh ((vi cua) OR (vai cua)) tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((sach ly) OR (sach y)) hang ca hoi. hieu ve cham luc van hanh ((vi cua) OR (vai cua)) tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ((sach ly) or (sach y)) hang ca hoi. hieu ve cham luc van hanh ((vi cua) OR (vai cua)) tuc".
• Adding a wildcard symbol may retrieve word variants: nuoc ((sach ly) or (sach y)) hang ca hoi. hieu ve cham luc van hanh ((vi cua) OR (vai cua)) tuc*.