Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
thien va » thien van, tien va, thien tai
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
va trien » va truyen, va thiet, va tuyen
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
soc van » hoc van, oc van, sac van

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 ky nang cau hoi. thien va cham soc van hanh lai ((va trien) or (va (thiet OR thieu)))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cau hoi. thien va cham soc van hanh lai ((va trien) OR (va (thiet OR thieu))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang cau hoi. thien va cham soc van hanh lai ((va trien) or (va (thiet OR thieu)))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cau hoi. thien va cham soc van hanh lai ((va trien) or (va (thiet OR thieu)))*.