Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
doi cua » hoi cua
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang ma) OR (tang ma)) hoi. hieu ve cac xuc van hanh ((dai cua) or (doi cua)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang ma) OR (tang ma)) hoi. hieu ve cac xuc van hanh ((dai cua) OR (doi cua)) cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang ma) OR (tang ma)) hoi. hieu ve cac xuc van hanh ((dai cua) or (doi cua)) cu".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) OR (tang ma)) hoi. hieu ve cac xuc van hanh ((dai cua) or (doi cua)) cu*.