Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
chau cau » chau cay, nhu cau, mau cau
hieu ke » hieu kem, chieu ke, hieu ky
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
bach y » sach y
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach y ((nang xa) OR (nang ma)) hoi. hieu ke ((chau cau) or (chau au)) va thanh va va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach y ((nang xa) OR (nang ma)) hoi. hieu ke ((chau cau) OR (chau au)) va thanh va va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach y ((nang xa) OR (nang ma)) hoi. hieu ke ((chau cau) or (chau au)) va thanh va va trien".
• Adding a wildcard symbol may retrieve word variants: vu bach y ((nang xa) OR (nang ma)) hoi. hieu ke ((chau cau) or (chau au)) va thanh va va trien*.