Perhaps you should try some spelling variations:
thuat van » thuat san, thuat va, thuat ban
dang thai » dang thi, dang hai, dang khai
nang cau » nang cao, hang cau, nang dau
thai cua » than cua, tai cuc, tri cua
van cac » van hac, van cau, dan cac
van bac » van ban, van bao, van hac
va dang » van dang, va nang, va lang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat van ky nang cau hoi. hieu ((van cac) or (van bac)) nuoc va dang thai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat van ky nang cau hoi. hieu ((van cac) OR (van bac)) nuoc va dang thai cua tu.
• Adding a wildcard symbol may retrieve word variants: thuat van ky nang cau hoi. hieu ((van cac) or (van bac)) nuoc va dang thai cua tu*.